/usr/share/xscreensaver/config/klein.xml is in xscreensaver-gl-extra 5.30-1+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="klein" _label="Klein" gl="yes">
<command arg="-root"/>
<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.
http://en.wikipedia.org/wiki/Klein_bottle
Written by Carsten Steger; 2008.
</_description>
</screensaver>
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