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] [-background
10 color] [-window] [-root] [-mono] [-install] [-visual visual] [-shm]
11 [-no-shm] [-delay usecs] [-duration secs] [-border-color color] [-bor‐
12 der-width integer] [-event-chance fraction] [-friction fraction]
13 [-springiness fraction] [-tile-size integer] [-transference fraction]
14 [-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
19 motion flow through the grid. This manpage describes v1.3 of the pro‐
20 gram.
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23 twang accepts the following options:
24 -window Draw on a newly-created window. This is the default.
26 -root Draw on the root window.
28 -mono If on a color display, pretend we're on a monochrome display.
30 -install
32 Install a private colormap for the window.
33 -visual visual
35 Which visual to use. Legal values are the name of a visual
36 class, or the id number (decimal or hex) of a specific visual.
37 -shm
39 -no-shm Use the shared memory extension (or not, respectively), if
41 available. This may speed things up a bit, but probably won't
42 make that much difference. If available, defaults to true,
43 resource useSHM.
44 -delay microseconds
46 The interframe delay, in microseconds. Defaults to 10000,
47 resource delay.
48 -duration seconds
50 How long to run before loading a new image. Default 120 sec‐
51 onds.
52 -border-color color
54 Color of the border surrounding each tile. Defaults to blue,
55 resource borderColor.
56 -border-width integer
58 Width of the border surrounding each tile. Defaults to 3,
59 resource borderWidth.
60 -event-chance fraction
62 The chance, per iteration, for an event to occur (such as
63 tweaking the orientation of a tile), in the range 0..1.
64 Defaults to 0.01, resource eventChance.
65 -friction fraction
67 How much friction there is in the system, in the range 0..1.
68 This is the amount by which velocities are damped per itera‐
69 tion. Defaults to 0.05, resource friction.
70 -springiness fraction
72 How springy the tiles are, in the range 0..1. This is the
73 fraction of an orientation that gets turned into a velocity
74 towards the center (resting point). Defaults to 0.1, resource
75 springiness.
76 -tile-size integer
78 Size (width and height) of each tile, not including the outer
79 edge of the border. Defaults to 120, resource tileSize.
80 -transference fraction
82 How much a tile's neighbors affect it, in the range 0..1. This
83 is the fraction of an orientation of a neighbor that gets
84 turned into a velocity in the same direction Defaults to 0.025,
85 resource transference.
86 -fps Display the current frame rate and CPU load.
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90 DISPLAY to get the default host and display number.
91 XENVIRONMENT
93 to get the name of a resource file that overrides the global
94 resources stored in the RESOURCE_MANAGER property.
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97 There are resource equivalents for each option, noted above.
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100 twang should have more interesting events.
101 Ways of speeding it up need to be investigated. It's kinda sluggish,
103 especially on hugeass displays.
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106 xscreensaver(1)
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109 Copyright © 2002 by Dan Bornstein. All rights reserved.
110 Permission to use, copy, modify, distribute, and sell this software and
112 its documentation for any purpose is hereby granted without fee, 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. No representations are made about the suitabil‐
116 ity of this software for any purpose. It is provided "as is" without
117 express or implied warranty.
118
120 Dan Bornstein <danfuzz@milk.com>.
121X Version 11 5.42-1.fc29 (30-Dec-2018) twang(6x)