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unknownpleasures(6)	      XScreenSaver manual	   unknownpleasures(6)

NAME
       unknownpleasures	 -  a  waterfall  graph	 of the	signal from pulsar PSR
       B1919+21.

SYNOPSIS
       unknownpleasures	 [--display  host:display.screen]  [--visual   visual]
       [--window] [--root] [--window-id	number]	[--delay number] [--count num-
       ber]   [--speed	number]	 [--resolution	number]	 [--amplitude  number]
       [--noise	number]	 [--mask  file]	 [--no-ortho]  [--buzz]	 [--wireframe]
       [--fps]

DESCRIPTION
       PSR  B1919+21  (AKA  CP	1919)  was the first pulsar ever discovered: a
       spinning	neutron	star emitting a	periodic  lighthouse-like  beacon.  An
       illustration of the signal received from	it was published in Scientific
       American	 in 1971, and later in The Cambridge Encyclopedia of Astronomy
       in 1977,	where it was seen by Stephen Morris, the drummer of Joy	 Divi-
       sion,  and was consequently appropriated	by Peter Saville for the cover
       of the band's album "Unknown Pleasures".

OPTIONS
       --visual	visual
	       Specify which visual to use.  Legal values are the  name	 of  a
	       visual  class,  or the id number	(decimal or hex) of a specific
	       visual.

       --window
	       Draw on a newly-created window.	This is	the default.

       --root  Draw on the root	window.

       --window-id number
	       Draw on the specified window.

       --delay number
	       Per-frame delay,	in microseconds.  Default:  30000  (0.03  sec-
	       onds).

       --speed number
	       Animation speed.	2 for twice as fast, 0.5 for half as fast.

       --count number
	       Scanlines (vertical resolution).	 Default: 80.

       --resolution number
	       Horizontal Resolution, Default: 100.

       --amplitude number
	       Height of the waves, 0 -	1.0.  Default: 0.13.

       --noise number
	       How  noisy the signal is. 2 for twice as	noisy, 0.5 for half as
	       noisy.

       --mask file
	       Use the given image file	as a clipping mask against  the	 data.
	       A  high	contrast  image	 of around 256x256 works best.	Signal
	       peaks appear in the dark	areas.

       --ortho | --no-ortho
	       Whether to use an orthographic projection.

       --buzz |	--no-buzz
	       Whether each line should	seethe with noise.

       --wireframe | --no-wireframe
	       Render in wireframe instead of solid.

       --fps | --no-fps
	       Whether to show a frames-per-second display at  the  bottom  of
	       the screen.

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.

       XSCREENSAVER_WINDOW
	       The window ID to	use with --root.

SEE ALSO
       X(1), xscreensaver(1)

COPYRIGHT
       Copyright (C) 2013-2018 by Jamie	Zawinski.  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 no-
       tice 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
       Jamie Zawinski.

X Version 11		      6.09 (07-Jun-2024)	   unknownpleasures(6)

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