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 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 Draw on a newly-created window. This is the default.
25 -root Draw on the root window.
27 -mono If on a color display, pretend we're on a monochrome display.
29 -install
31 Install a private colormap for the window.
32 -visual visual
34 Which visual to use. Legal values are the name of a visual
35 class, or the id number (decimal or hex) of a specific visual.
36 -shm
38 -no-shm Use the shared memory extension (or not, respectively), if
40 available. This may speed things up a bit, but probably won't
41 make that much difference. If available, defaults to true, re‐
42 source useSHM.
43 -delay microseconds
45 The interframe delay, in microseconds. Defaults to 10000, re‐
46 source delay.
47 -duration seconds
49 How long to run before loading a new image. Default 120 sec‐
50 onds.
51 -border-color color
53 Color of the border surrounding each tile. Defaults to blue,
54 resource borderColor.
55 -border-width integer
57 Width of the border surrounding each tile. Defaults to 3, re‐
58 source borderWidth.
59 -event-chance fraction
61 The chance, per iteration, for an event to occur (such as
62 tweaking the orientation of a tile), in the range 0..1. De‐
63 faults to 0.01, resource eventChance.
64 -friction fraction
66 How much friction there is in the system, in the range 0..1.
67 This is the amount by which velocities are damped per itera‐
68 tion. Defaults to 0.05, resource friction.
69 -springiness fraction
71 How springy the tiles are, in the range 0..1. This is the
72 fraction of an orientation that gets turned into a velocity to‐
73 wards the center (resting point). Defaults to 0.1, resource
74 springiness.
75 -tile-size integer
77 Size (width and height) of each tile, not including the outer
78 edge of the border. Defaults to 120, resource tileSize.
79 -transference fraction
81 How much a tile's neighbors affect it, in the range 0..1. This
82 is the fraction of an orientation of a neighbor that gets
83 turned into a velocity in the same direction Defaults to 0.025,
84 resource transference.
85 -fps Display the current frame rate and CPU load.
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89 DISPLAY to get the default host and display number.
90 XENVIRONMENT
92 to get the name of a resource file that overrides the global
93 resources stored in the RESOURCE_MANAGER property.
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96 There are resource equivalents for each option, noted above.
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99 twang should have more interesting events.
100 Ways of speeding it up need to be investigated. It's kinda sluggish,
102 especially on hugeass displays.
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105 xscreensaver(1)
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108 Copyright © 2002 by Dan Bornstein. All rights reserved.
109 Permission to use, copy, modify, distribute, and sell this software and
111 its documentation for any purpose is hereby granted without fee, pro‐
112 vided that the above copyright notice appear in all copies and that
113 both that copyright notice and this permission notice appear in sup‐
114 porting documentation. No representations are made about the suitabil‐
115 ity of this software for any purpose. It is provided "as is" without
116 express or implied warranty.
117
119 Dan Bornstein <danfuzz@milk.com>.
120X Version 11 6.04-1.fc36 (06-Jun-2022) twang(6x)