xscreensaver-gl 5.30-1+deb8u2 / usr / share / xscreensaver / config / projectiveplane.xml

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/usr/share/xscreensaver/config/projectiveplane.xml is in xscreensaver-gl 5.30-1+deb8u2.

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

<screensaver name="projectiveplane" _label="ProjectivePlane" gl="yes">

  <command arg="-root"/>

  <hgroup>
    <select id="view-mode">
      <option id="walk"      _label="Random motion"/>
      <option id="walk"      _label="Walk"          arg-set="-view-mode walk"/>
      <option id="turn"      _label="Turn"          arg-set="-view-mode turn"/>
      <option id="walk-turn" _label="Walk and turn" arg-set="-view-mode walk-turn"/>
    </select>

    <boolean id="orientation-marks" _label="Show orientation marks"
              arg-set="-orientation-marks"/>
  </hgroup>

  <hgroup>
    <select id="display-mode">
      <option id="random"      _label="Random surface"/>
      <option id="wire"        _label="Wireframe mesh"      arg-set="-mode wireframe"/>
      <option id="surface"     _label="Solid surface"       arg-set="-mode surface"/>
      <option id="transparent" _label="Transparent surface" arg-set="-mode transparent"/>
    </select>

    <select id="appearance">
      <option id="random" _label="Random pattern"/>
      <option id="solid"  _label="Solid object"    arg-set="-appearance solid"/>
      <option id="bands"  _label="Distance bands"  arg-set="-appearance distance-bands"/>
      <option id="bands"  _label="Direction bands" arg-set="-appearance direction-bands"/>
    </select>

    <select id="colors">
      <option id="random"   _label="Random coloration"/>
      <option id="twosided" _label="Two-sided"        arg-set="-colors two-sided"/>
      <option id="rainbow"  _label="Distance colors"  arg-set="-colors distance"/>
      <option id="rainbow"  _label="Direction colors" arg-set="-colors direction"/>
      <option id="depth"    _label="4d depth colors"  arg-set="-colors depth"/>
    </select>

    <select id="projection3d">
      <option id="random"          _label="Random 3D"/>
      <option id="perspective-3d"  _label="Perspective 3D"  arg-set="-projection-3d perspective"/>
      <option id="orthographic-3d" _label="Orthographic 3D" arg-set="-projection-3d orthographic"/>
    </select>

    <select id="projection4d">
      <option id="random"          _label="Random 4D"/>
      <option id="perspective-4d"  _label="Perspective 4D"  arg-set="-projection-4d perspective"/>
      <option id="orthographic-4d" _label="Orthographic 4D" arg-set="-projection-4d orthographic"/>
    </select>
  </hgroup>

  <hgroup>
    <vgroup>
      <number id="speed-wx" type="slider" arg="-speed-wx %"
              _label="WX rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="1.1"/>

      <number id="speed-wy" type="slider" arg="-speed-wy %"
              _label="WY rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="1.3"/>

      <number id="speed-wz" type="slider" arg="-speed-wz %"
              _label="WZ rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="1.5"/>
    </vgroup>

    <vgroup>
      <number id="speed-xy" type="slider" arg="-speed-xy %"
              _label="XY rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="1.7"/>

      <number id="speed-xz" type="slider" arg="-speed-xz %"
              _label="XZ rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="1.9"/>

      <number id="speed-yz" type="slider" arg="-speed-yz %"
              _label="YZ rotation speed"
              _low-label="-4.0" _high-label="4.0"
              low="-4.0" high="4.0" default="2.1"/>
    </vgroup>

    <vgroup>
     <number id="walk-direction" type="slider" arg="-walk-direction %"
             _label="Walking direction"
             _low-label="-180.0" _high-label="180.0"
             low="-180.0" high="180.0" default="83.0"/>

     <number id="walk-speed" type="slider" arg="-walk-speed %"
             _label="Walking speed"
             _low-label="1.0" _high-label="100.0"
             low="1.0" high="100.0" default="20.0"/>

     <number id="delay" type="slider" arg="-delay %"
             _label="Frame rate" _low-label="Low" _high-label="High"
             low="0" high="100000" default="10000"
             convert="invert"/>

     <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
    </vgroup>
  </hgroup>

  <xscreensaver-updater />

  <_description>
A 4D embedding of the real projective plane.

You can walk on the surface of the real projective plane or rotate it
in 4D or walk on it while it rotates in 4D.  Inspired by Thomas
Banchoff's book "Beyond the Third Dimension: Geometry, Computer
Graphics, and Higher Dimensions", Scientific American Library, 1990.

http://en.wikipedia.org/wiki/Real_projective_plane
http://en.wikipedia.org/wiki/Roman_surface
http://en.wikipedia.org/wiki/Cross_cap
http://en.wikipedia.org/wiki/Moebius_strip
http://mathworld.wolfram.com/RealProjectivePlane.html
http://mathworld.wolfram.com/RomanSurface.html
http://mathworld.wolfram.com/Cross-Cap.html
http://mathworld.wolfram.com/MoebiusStrip.html

Written by Carsten Steger; 2014.
  </_description>
</screensaver>

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