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] [-event-chance fraction]
[-friction fraction] [-springiness fraction]
[-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, 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.
- -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.
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>.