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+<?xml version="1.0" encoding="ISO-8859-1"?>
+
+<screensaver name="klein" _label="Klein" gl="yes">
+
+ <command arg="-root"/>
+
+ <video href="https://www.youtube.com/watch?v=c2gvyGVNG80"/>
+
+ <hgroup>
+ <select id="kleinbottle">
+ <option id="random" _label="Random shape"/>
+ <option id="figure-8" _label="Figure 8" arg-set="-klein-bottle figure-8"/>
+ <option id="squeezed-torus" _label="Squeezed torus" arg-set="-klein-bottle squeezed-torus"/>
+ <option id="lawson" _label="Lawson" arg-set="-klein-bottle lawson"/>
+ </select>
+
+ <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="See-through bands" arg-set="-appearance 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="Rainbow colors" arg-set="-colors rainbow"/>
+ <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="7.0"/>
+
+ <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 Klein bottle is the 4D analog of a moebius strip.
+
+You can walk on the surface of the bottle 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.
+
+https://en.wikipedia.org/wiki/Klein_bottle
+
+Written by Carsten Steger; 2008.
+ </_description>
+</screensaver>