unknownpleasures
Section: XScreenSaver manual (6x)
Updated: 6.00-1.fc34 (02-Apr-2021)
Page Index
NAME
unknownpleasures - a waterfall graph of the signal from pulsar PSR B1919+21.
SYNOPSIS
unknownpleasures
[-display
host:display.screen]
[-visual
visual]
[-window]
[-root]
[-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.
- -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.
SEE ALSO
X(1),
xscreensaver(1)
COPYRIGHT
Copyright © 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.