1unknownpleasures(6x) XScreenSaver manual unknownpleasures(6x)
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6 unknownpleasures - a waterfall graph of the signal from pulsar PSR
7 B1919+21.
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10 unknownpleasures [--display host:display.screen] [--visual visual]
11 [--window] [--root] [--window-id number] [--delay number] [--count num‐
12 ber] [--speed number] [--resolution number] [--amplitude number]
13 [--noise number] [--mask file] [--no-ortho] [--buzz] [--wireframe]
14 [--fps]
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17 PSR B1919+21 (AKA CP 1919) was the first pulsar ever discovered: a
18 spinning neutron star emitting a periodic lighthouse-like beacon. An
19 illustration of the signal received from it was published in Scientific
20 American in 1971, and later in The Cambridge Encyclopedia of Astronomy
21 in 1977, where it was seen by Stephen Morris, the drummer of Joy Divi‐
22 sion, and was consequently appropriated by Peter Saville for the cover
23 of the band's album "Unknown Pleasures".
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26 --visual visual
27 Specify which visual to use. Legal values are the name of a
28 visual class, or the id number (decimal or hex) of a specific
29 visual.
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31 --window
32 Draw on a newly-created window. This is the default.
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34 --root Draw on the root window.
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36 --window-id number
37 Draw on the specified window.
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39 --delay number
40 Per-frame delay, in microseconds. Default: 30000 (0.03 sec‐
41 onds).
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43 --speed number
44 Animation speed. 2 for twice as fast, 0.5 for half as fast.
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46 --count number
47 Scanlines (vertical resolution). Default: 80.
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49 --resolution number
50 Horizontal Resolution, Default: 100.
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52 --amplitude number
53 Height of the waves, 0 - 1.0. Default: 0.13.
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55 --noise number
56 How noisy the signal is. 2 for twice as noisy, 0.5 for half as
57 noisy.
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59 --mask file
60 Use the given image file as a clipping mask against the data.
61 A high contrast image of around 256x256 works best. Signal
62 peaks appear in the dark areas.
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64 --ortho | --no-ortho
65 Whether to use an orthographic projection.
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67 --buzz | --no-buzz
68 Whether each line should seethe with noise.
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70 --wireframe | --no-wireframe
71 Render in wireframe instead of solid.
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73 --fps | --no-fps
74 Whether to show a frames-per-second display at the bottom of
75 the screen.
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78 DISPLAY to get the default host and display number.
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80 XENVIRONMENT
81 to get the name of a resource file that overrides the global
82 resources stored in the RESOURCE_MANAGER property.
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84 XSCREENSAVER_WINDOW
85 The window ID to use with --root.
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88 X(1), xscreensaver(1)
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91 Copyright © 2013-2018 by Jamie Zawinski. Permission to use, copy, mod‐
92 ify, distribute, and sell this software and its documentation for any
93 purpose is hereby granted without fee, provided that the above copy‐
94 right notice appear in all copies and that both that copyright notice
95 and this permission notice appear in supporting documentation. No rep‐
96 resentations are made about the suitability of this software for any
97 purpose. It is provided "as is" without express or implied warranty.
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100 Jamie Zawinski.
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104X Version 11 6.06-1.fc37 (12-Dec-2022) unknownpleasures(6x)