xscreensaver(1)
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 microseconds] [-border-color color] [-border-width integer] [-eventchance fraction] [-friction fraction] [-springiness frac_ tion] [-tile-size integer] [-transference fraction]
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, respec
- tively), 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. - -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 veloci
ties 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 includ
ing 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 orienta
tion of a neighbor that gets turned into a veloc
ity in the same direction Defaults to 0.025,
resource transference.
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_MAN
AGER 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
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 suit
ability of this software for any purpose. It is provided
"as is" without express or implied warranty.
AUTHOR
- Dan Bornstein <danfuzz@milk.com>.