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

<screensaver name="dymaxionmap" _label="Dymaxion Map" gl="yes">

  <command arg="--root"/>

  <video href="https://www.youtube.com/watch?v=4LnO0UiccGs"/>

  <hgroup>

   <vgroup>

    <select id="map">
     <option id="flat"  _label="Flat map"/>
     <option id="day"   _label="Satellite map" arg-set="--image BUILTIN_SAT"/>
    </select>

    <hgroup>

     <vgroup>
      <boolean id="stars"  _label="Stars"       arg-unset="--no-stars"/>
      <boolean id="grid"   _label="Lat / Long"  arg-unset="--no-grid"/>
      <boolean id="wander" _label="Wander"    arg-unset="--no-wander"/>
     </vgroup>

     <vgroup>
      <boolean id="roll"   _label="Roll"      arg-unset="--no-roll"/>
      <boolean id="wire"    _label="Wireframe"       arg-set="--wireframe"/>
      <boolean id="showfps" _label="Show frame rate" arg-set="--fps"/>
     </vgroup>

    </hgroup>
   </vgroup>

   <vgroup>
    <number id="delay" type="slider" arg="--delay %"
            _label="Frame rate" _low-label="Low" _high-label="High"
            low="0" high="100000" default="20000"
            convert="invert"/>
    <number id="speed" type="slider" arg="--speed %"
            _label="Animation speed" _low-label="Slow" _high-label="Fast"
            low="0.05" high="10.0" default="1.0"
            convert="ratio"/>
   </vgroup>
   <vgroup>
    <number id="frames" type="slider" arg="--frames %"
            _label="Day / night smoothness" _low-label="Low" _high-label="High"
            low="24" high="1440" default="720"/>
    <xscreensaver-updater />
   </vgroup>

  </hgroup>

  <_description>
Buckminster Fuller's map of the Earth projected onto the surface of an
unfolded icosahedron.  It depicts the Earth's continents as one island,
or nearly contiguous land masses.  This screen saver animates the
progression of the dusk terminator across the flattened globe. It
includes both satellite and flat-colored map imagery, and can load and
convert other Equirectangular-projected maps.

"Dymaxion Map" and "The Fuller Projection Map" are trademarks of
The Buckminster Fuller Institute.
The original Dymaxion Map image is copyright 1982 by
The Buckminster Fuller Institute. (This program does not use their
imagery, only similar trigonometry.)
The Dymaxion Map was covered by now-expired US Patent 2,393,676
(Richard Buckminster Fuller, 1946).

https://en.wikipedia.org/wiki/Dymaxion_map
https://en.wikipedia.org/wiki/Buckminster_Fuller
https://en.wikipedia.org/wiki/List_of_map_projections
https://en.wikipedia.org/wiki/Cahill%E2%80%93Keyes_projection
https://en.wikipedia.org/wiki/Waterman_butterfly_projection

Written by Jamie Zawinski; 2016.
  </_description>
</screensaver>
