git.hungrycats.org Git - xscreensaver/blob - hacks/config/quasicrystal.xml

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2
   3 <screensaver name="quasicrystal" _label="QuasiCrystal" gl="yes">
   4
   5   <command arg="-root"/>
   6
   7   <hgroup>
   8    <vgroup>
   9     <number id="delay" type="slider" arg="-delay %"
  10             _label="Frame rate" _low-label="Low" _high-label="High"
  11             low="0" high="100000" default="30000"
  12             convert="invert"/>
  13
  14     <number id="speed" type="slider" arg="-speed %"
  15             _label="Speed" _low-label="Slow" _high-label="Fast"
  16             low="0.1" high="5.0" default="1.0"/>
  17    </vgroup>
  18    <vgroup>
  19     <number id="count" type="slider" arg="-count %"
  20             _label="Density" _low-label="Low" _high-label="High"
  21             low="7" high="37" default="17"/>
  22
  23     <number id="contrast" type="slider" arg="-contrast %"
  24             _label="Contrast" _low-label="Low" _high-label="High"
  25             low="0" high="100" default="30"/>
  26    </vgroup>
  27   </hgroup>
  28
  29   <hgroup>
  30    <boolean id="wander"    _label="Displacement" arg-unset="-no-wander"/>
  31    <boolean id="spin"      _label="Rotation"     arg-unset="-no-spin"/>
  32    <boolean id="symmetric" _label="Symmetry"     arg-unset="-no-symmetry"/>
  33    <boolean id="showfps"   _label="Show frame rate" arg-set="-fps"/>
  34   </hgroup>
  35
  36   <_description>
  37 A quasicrystal is a structure that is ordered but aperiodic.
  38 Two-dimensional quasicrystals can be generated by adding a set of
  39 planes where x is the sine of y.  Different complex aperiodic plane
  40 tilings are produced depending on the period, position, and rotation
  41 of the component planes, and whether the rotation of the planes is
  42 evenly distributed around the circle (the "symmetry" option, above)
  43 or random.
  44
  45 See also the "RD-Bomb", "CWaves" and "Penrose" screen savers.
  46
  47 http://en.wikipedia.org/wiki/Quasicrystal
  48
  49 Written by Jamie Zawinski; 2013.
  50   </_description>
  51 </screensaver>