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
number] [--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 Division, 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
seconds).

--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
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

Jamie Zawinski.

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