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 microseconds] [-border-color color] [-border-width
12 integer] [-event-chance fraction] [-friction fraction] [-springiness
13 fraction] [-tile-size integer] [-transference fraction]
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16 Twang divides the screen into equal-sized tiles, and then plucks them
17 in various ways. Tiles are affected by their neighbors, so waves of
18 motion flow through the grid. This manpage describes v1.3 of the pro‐
19 gram.
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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,
42 resource useSHM.
43 -delay microseconds
45 The interframe delay, in microseconds. Defaults to 10000,
46 resource delay.
47 -border-color color
49 Color of the border surrounding each tile. Defaults to blue,
50 resource borderColor.
51 -border-width integer
53 Width of the border surrounding each tile. Defaults to 3,
54 resource borderWidth.
55 -event-chance fraction
57 The chance, per iteration, for an event to occur (such as
58 tweaking the orientation of a tile), in the range 0..1.
59 Defaults to 0.01, resource eventChance.
60 -friction fraction
62 How much friction there is in the system, in the range 0..1.
63 This is the amount by which velocities are damped per itera‐
64 tion. Defaults to 0.05, resource friction.
65 -springiness fraction
67 How springy the tiles are, in the range 0..1. This is the
68 fraction of an orientation that gets turned into a velocity
69 towards the center (resting point). Defaults to 0.1, resource
70 springiness.
71 -tile-size integer
73 Size (width and height) of each tile, not including the outer
74 edge of the border. Defaults to 120, resource tileSize.
75 -transference fraction
77 How much a tile's neighbors affect it, in the range 0..1. This
78 is the fraction of an orientation of a neighbor that gets
79 turned into a velocity in the same direction Defaults to 0.025,
80 resource transference.
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83 DISPLAY to get the default host and display number.
84 XENVIRONMENT
86 to get the name of a resource file that overrides the global
87 resources stored in the RESOURCE_MANAGER property.
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90 There are resource equivalents for each option, noted above.
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93 twang should have more interesting events.
94 Ways of speeding it up need to be investigated. It's kinda sluggish,
96 especially on hugeass displays.
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99 xscreensaver(1)
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102 Copyright © 2002 by Dan Bornstein. All rights reserved.
103 Permission to use, copy, modify, distribute, and sell this software and
105 its documentation for any purpose is hereby granted without fee, pro‐
106 vided that the above copyright notice appear in all copies and that
107 both that copyright notice and this permission notice appear in sup‐
108 porting documentation. No representations are made about the suitabil‐
109 ity of this software for any purpose. It is provided "as is" without
110 express or implied warranty.
111
113 Dan Bornstein <danfuzz@milk.com>.
114X Version 11 5.05-3 (06-Apr-2008) twang(6x)