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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 mo-
       tion 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, re-
	       source useSHM.

       -delay microseconds
	       The interframe delay, in	microseconds. Defaults to  10000,  re-
	       source 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, re-
	       source 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. De-
	       faults 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 to-
	       wards 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, 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		      5.44 (20-Mar-2020)		      twang(6)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | X RESOURCES | BUGS | SEE ALSO | COPYRIGHT | AUTHOR

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