<?xml version="1.0" encoding="ISO-8859-1"?>

<screensaver name="unknownpleasures" _label="Unknown Pleasures" gl="yes">

  <command arg="--root"/>

  <video href="https://www.youtube.com/watch?v=DEWPiUbwnt0"/>

  <hgroup>
   <vgroup>
    <number id="delay" type="slider" arg="--delay %"
            _label="Frame rate" _low-label="Low" _high-label="High"
            low="0" high="100000" default="30000"
            convert="invert"/>

    <number id="count" type="slider" arg="--count %"
            _label="Scanlines" _low-label="Few" _high-label="Many"
            low="3" high="200" default="80"/>

    <number id="speed" type="slider" arg="--speed %"
            _label="Speed" _low-label="Slow" _high-label="Fast"
            low="0.1" high="20.0" default="1.0"
            convert="ratio"/>
   </vgroup>

   <vgroup>
    <number id="resolution" type="slider" arg="--resolution %"
            _label="Resolution" _low-label="Low" _high-label="High"
            low="5" high="300" default="100"/>

    <number id="amplitude" type="slider" arg="--amplitude %"
            _label="Amplitude" _low-label="Low" _high-label="High"
            low="0.01" high="0.25" default="0.13"/>

    <number id="noise" type="slider" arg="--noise %"
            _label="Noise" _low-label="Low" _high-label="High"
            low="0.0" high="3.0" default="1.0"/>
   </vgroup>
  </hgroup>

  <hgroup>
   <boolean id="ortho" _label="Orthographic Projection" arg-unset="--no-ortho"/>
   <boolean id="buzz"    _label="Buzz"                  arg-set="--buzz"/>
   <boolean id="wire"    _label="Wireframe"             arg-set="--wireframe"/>
   <boolean id="showfps" _label="Show frame rate" arg-set="--fps"/>
  </hgroup>

  <file id="mask" _label="Mask image" arg="--mask %"/>

  <xscreensaver-updater />

  <_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".

https://en.wikipedia.org/wiki/Pulsar
https://en.wikipedia.org/wiki/PSR_B1919%2B21
https://en.wikipedia.org/wiki/Unknown_Pleasures
https://en.wikipedia.org/wiki/Peter_Saville_%28graphic_designer%29
https://en.wikipedia.org/wiki/Joy_Division

Written by Jamie Zawinski; 2013.
  </_description>
</screensaver>
