/usr/share/xscreensaver/config/glschool.xml is in xscreensaver-gl 5.36-1.
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 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="glschool" _label="GLSchool" gl="yes">
<command arg="-root"/>
<video href="https://www.youtube.com/watch?v=SuMIatcSPdU"/>
<hgroup>
<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="NFish" type="slider" arg="-nfish %"
_label="Fish count" _low-label="Few" _high-label="Lots"
low="5" high="500" default="100"/>
<number id="AvoidFact" type="slider" arg="-avoidfact %" _label="Avoidance" _low-label="None" _high-label="High" low="0" high="10" default="1.5"/>
</vgroup>
<vgroup>
<number id="MatchFact" type="slider" arg="-matchfact %" _label="Velocity matching" _low-label="None" _high-label="High" low="0" high="3" default="0.15"/>
<number id="CenterFact" type="slider" arg="-centerfact %" _label="Centering" _low-label="None" _high-label="High" low="0" high="1.0" default="0.1"/>
<number id="TargetFact" type="slider" arg="-targetfact %" _label="Goal following" _low-label="None" _high-label="High" low="0" high="400" default="80"/>
</vgroup>
</hgroup>
<hgroup>
<boolean id="wire" _label="Wireframe" arg-set="-wireframe"/>
<boolean id="fog" _label="Fog" arg-set="-fog"/>
<boolean id="drawgoal" _label="Draw goal" arg-set="-drawgoal"/>
<boolean id="drawbbox" _label="Draw bounding box" arg-unset="-no-drawbbox"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
</hgroup>
<xscreensaver-updater />
<_description>
A school of fish, using the classic "Boids" algorithm by Craig Reynolds.
https://en.wikipedia.org/wiki/Boids
Written by David C. Lambert and Jamie Zawinski; 2006.
</_description>
</screensaver>
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