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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] [-bor‐
       der-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  pro‐
       gram.

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  sec‐
	       onds.

       -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	itera‐
	       tion.  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,  pro‐
       vided  that  the	 above	copyright notice appear in all copies and that
       both that copyright notice and this permission notice  appear  in  sup‐
       porting	documentation. No representations are made about the suitabil‐
       ity 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		      5.07 (10-Aug-2008)		      twang(6)
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