Provided by: xscreensaver-gl-extra_5.34-2ubuntu1_amd64 bug


       unknownpleasures - an animation of the signal from the pulsar PSR B1919+21.


       unknownpleasures [-display host:display.screen] [-visual visual] [-window] [-root] [-delay
       number] [-speed percent] [-count integer] [-resolution percent] [-no-ortho] [-fps]


       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


       -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.

       -count number
               Horizontal Resolution, Default: 100%.

       -ortho | -no-ortho
               Whether to use an orthographic projection.

       -fps | -no-fps
               Whether to show a frames-per-second display at the bottom of the screen.


       DISPLAY to get the default host and display number.

               to get the name of a resource file that overrides the global resources  stored  in
               the RESOURCE_MANAGER property.


       X(1), xscreensaver(1)


       Copyright © 2013 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.


       Jamie Zawinski.