1twang(6x)                     XScreenSaver manual                    twang(6x)
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NAME

6       twang - pluck pieces of the screen
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SYNOPSIS

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]
15

DESCRIPTION

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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OPTIONS

23       twang accepts the following options:
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25       -window Draw on a newly-created window.  This is the default.
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27       -root   Draw on the root window.
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29       -mono   If on a color display, pretend we're on a monochrome display.
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31       -install
32               Install a private colormap for the window.
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34       -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.
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38       -shm
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40       -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.
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45       -delay microseconds
46               The  interframe  delay,  in  microseconds.  Defaults  to 10000,
47               resource delay.
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49       -duration seconds
50               How long to run before loading a new image.  Default  120  sec‐
51               onds.
52
53       -border-color color
54               Color  of  the  border surrounding each tile. Defaults to blue,
55               resource borderColor.
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57       -border-width integer
58               Width of the border  surrounding  each  tile.  Defaults  to  3,
59               resource borderWidth.
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61       -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.
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66       -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.
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71       -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.
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77       -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.
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81       -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.
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87       -fps    Display the current frame rate and CPU load.
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ENVIRONMENT

90       DISPLAY to get the default host and display number.
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92       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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X RESOURCES

97       There are resource equivalents for each option, noted above.
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BUGS

100       twang should have more interesting events.
101
102       Ways of speeding it up need to be investigated. It's kinda sluggish,
103               especially on hugeass displays.
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SEE ALSO

106       xscreensaver(1)
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109       Copyright © 2002 by Dan Bornstein. All rights reserved.
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111       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

AUTHOR

120       Dan Bornstein <danfuzz@milk.com>.
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124X Version 11               5.42-1.fc29 (30-Dec-2018)                 twang(6x)
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