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.