1unknownpleasures(6x)          XScreenSaver manual         unknownpleasures(6x)
2
3
4

NAME

6       unknownpleasures  -  a  waterfall  graph  of the signal from pulsar PSR
7       B1919+21.
8

SYNOPSIS

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]
15

DESCRIPTION

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".
24

OPTIONS

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.
30
31       --window
32               Draw on a newly-created window.  This is the default.
33
34       --root  Draw on the root window.
35
36       --window-id number
37               Draw on the specified window.
38
39       --delay number
40               Per-frame delay, in microseconds.  Default:  30000  (0.03  sec‐
41               onds).
42
43       --speed number
44               Animation speed. 2 for twice as fast, 0.5 for half as fast.
45
46       --count number
47               Scanlines (vertical resolution).  Default: 80.
48
49       --resolution number
50               Horizontal Resolution, Default: 100.
51
52       --amplitude number
53               Height of the waves, 0 - 1.0.  Default: 0.13.
54
55       --noise number
56               How  noisy the signal is. 2 for twice as noisy, 0.5 for half as
57               noisy.
58
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.
63
64       --ortho | --no-ortho
65               Whether to use an orthographic projection.
66
67       --buzz | --no-buzz
68               Whether each line should seethe with noise.
69
70       --wireframe | --no-wireframe
71               Render in wireframe instead of solid.
72
73       --fps | --no-fps
74               Whether to show a frames-per-second display at  the  bottom  of
75               the screen.
76

ENVIRONMENT

78       DISPLAY to get the default host and display number.
79
80       XENVIRONMENT
81               to  get  the  name of a resource file that overrides the global
82               resources stored in the RESOURCE_MANAGER property.
83
84       XSCREENSAVER_WINDOW
85               The window ID to use with --root.
86

SEE ALSO

88       X(1), xscreensaver(1)
89

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.
98

AUTHOR

100       Jamie Zawinski.
101
102
103
104X Version 11               6.06-1.fc37 (12-Dec-2022)      unknownpleasures(6x)
Impressum