Provided by: xscreensaver-data-extra_5.36-1ubuntu1_amd64 
NAME
twang - pluck pieces of the screen
SYNOPSIS
twang [-display host:display.screen] [-foreground color] [-background color] [-window] [-root] [-mono]
[-install] [-visual visual] [-shm] [-no-shm] [-delay usecs] [-duration secs] [-border-color color]
[-border-width integer] [-event-chance fraction] [-friction fraction] [-springiness fraction] [-tile-size
integer] [-transference fraction] [-fps]
DESCRIPTION
Twang divides the screen into equal-sized tiles, and then plucks them in various ways. Tiles are affected
by their neighbors, so waves of motion flow through the grid. This manpage describes v1.3 of the program.
OPTIONS
twang accepts the following options:
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
-mono If on a color display, pretend we're on a monochrome display.
-install
Install a private colormap for the window.
-visual visual
Which visual to use. Legal values are the name of a visual class, or the id number (decimal or
hex) of a specific visual.
-shm
-no-shm Use the shared memory extension (or not, respectively), if available. This may speed things up a
bit, but probably won't make that much difference. If available, defaults to true, resource
useSHM.
-delay microseconds
The interframe delay, in microseconds. Defaults to 10000, resource delay.
-duration seconds
How long to run before loading a new image. Default 120 seconds.
-border-color color
Color of the border surrounding each tile. Defaults to blue, resource borderColor.
-border-width integer
Width of the border surrounding each tile. Defaults to 3, resource borderWidth.
-event-chance fraction
The chance, per iteration, for an event to occur (such as tweaking the orientation of a tile), in
the range 0..1. Defaults to 0.01, resource eventChance.
-friction fraction
How much friction there is in the system, in the range 0..1. This is the amount by which
velocities are damped per iteration. Defaults to 0.05, resource friction.
-springiness fraction
How springy the tiles are, in the range 0..1. This is the fraction of an orientation that gets
turned into a velocity towards the center (resting point). Defaults to 0.1, resource springiness.
-tile-size integer
Size (width and height) of each tile, not including the outer edge of the border. Defaults to
120, resource tileSize.
-transference fraction
How much a tile's neighbors affect it, in the range 0..1. This is the fraction of an orientation
of a neighbor that gets turned into a velocity in the same direction Defaults to 0.025, resource
transference.
-fps Display the current frame rate and CPU load.
ENVIRONMENT
DISPLAY to get the default host and display number.
XENVIRONMENT
to get the name of a resource file that overrides the global resources stored in the
RESOURCE_MANAGER property.
X RESOURCES
There are resource equivalents for each option, noted above.
BUGS
twang should have more interesting events.
Ways of speeding it up need to be investigated. It's kinda sluggish,
especially on hugeass displays.
SEE ALSO
xscreensaver(1)
COPYRIGHT
Copyright © 2002 by Dan Bornstein. All rights reserved.
Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose
is hereby granted without fee, provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in supporting documentation. No
representations are made about the suitability of this software for any purpose. It is provided "as is"
without express or implied warranty.
AUTHOR
Dan Bornstein <danfuzz@milk.com>.