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

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2
   3 <screensaver name="ifs" _label="IFS">
   4
   5   <command arg="-root"/>
   6
   7   <video href="https://www.youtube.com/watch?v=0uOIrVFsECM"/>
   8
   9   <number id="delay" type="slider" arg="-delay %"
  10     _label="Frame rate" _low-label="Low" _high-label="High"
  11     low="0" high="100000" default="20000"
  12     convert="invert"/>
  13
  14   <number id="functions" type="slider" arg="-functions %"
  15     _label="Number of functions" _low-label="2" _high-label="6"
  16            low="2" high="6" default="3"/>
  17
  18   <number id="detail" type="slider" arg="-detail %"
  19     _label="Detail" _low-label="Low" _high-label="High"
  20     low="4" high="14" default="9"/>
  21
  22 <!--
  23   On a 2.93 gHz iMac i7, I get these rates with -delay 0:
  24
  25     detail 3:  invisible
  26     detail 4:  barely visible
  27     detail 5:  1000+ fps, looks like noise at -delay 0, ok at -delay 20000
  28     detail 8:  ~700+ fps
  29     detail 9:  ~400 fps
  30     detail 10: ~300 fps
  31     detail 11: ~100 fps
  32     detail 12:  ~50 fps
  33     detail 13:  ~17 fps
  34     detail 14:   ~8 fps
  35     detail 15:   ~2 fps
  36
  37   With the default -delay, CPU load only starts causing the frame rate
  38   to drop below 30 fps detail 12 or higher.
  39 -->
  40
  41   <number id="colors" type="slider" arg="-colors %"
  42     _label="Number of colors" _low-label="2" _high-label="Many"
  43     low="2" high="255" default="200" />
  44
  45   <hgroup>
  46    <boolean id="translate" _label="Translate" arg-unset="-no-translate"/>
  47    <boolean id="scale"     _label="Scale"     arg-unset="-no-scale"/>
  48    <boolean id="rotate"    _label="Rotate"    arg-unset="-no-rotate"/>
  49    <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
  50   </hgroup>
  51
  52   <xscreensaver-updater />
  53
  54   <_description>
  55
  56 Clouds of iterated function systems spin and collide.
  57
  58 Note that the "Detail" parameter is exponential.  Number of points
  59 drawn is functions^detail.
  60
  61 https://en.wikipedia.org/wiki/Iterated_function_system
  62
  63 Written by Chris Le Sueur and Robby Griffin; 1997.
  64   </_description>
  65 </screensaver>