DragonFly On-Line Manual Pages

twang(6)                      XScreenSaver manual                     twang(6)

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 (C) 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>.

X Version 11                  5.34 (24-Oct-2015)                      twang(6)