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]  [-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.

       -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.