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 © 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.