1 <?xml version="1.0" encoding="ISO-8859-1"?>
3 <screensaver name="ifs" _label="IFS">
7 <number id="delay" type="slider" arg="-delay %"
8 _label="Frame rate" _low-label="Low" _high-label="High"
9 low="0" high="100000" default="20000"
12 <number id="functions" type="slider" arg="-functions %"
13 _label="Number of functions" _low-label="2" _high-label="6"
14 low="2" high="6" default="3"/>
16 <number id="detail" type="slider" arg="-detail %"
17 _label="Detail" _low-label="Low" _high-label="High"
18 low="4" high="14" default="9"/>
21 On a 2.93 gHz iMac i7, I get these rates with -delay 0:
24 detail 4: barely visible
25 detail 5: 1000+ fps, looks like noise at -delay 0, ok at -delay 20000
35 With the default -delay, CPU load only starts causing the frame rate
36 to drop below 30 fps detail 12 or higher.
39 <number id="colors" type="slider" arg="-colors %"
40 _label="Number of colors" _low-label="2" _high-label="Many"
41 low="2" high="255" default="200" />
44 <boolean id="translate" _label="Translate" arg-unset="-no-translate"/>
45 <boolean id="scale" _label="Scale" arg-unset="-no-scale"/>
46 <boolean id="rotate" _label="Rotate" arg-unset="-no-rotate"/>
47 <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
50 <xscreensaver-updater />
54 Clouds of iterated function systems spin and collide.
56 Note that the "Detail" parameter is exponential. Number of points
57 drawn is functions^detail.
59 http://en.wikipedia.org/wiki/Iterated_function_system
61 Written by Chris Le Sueur and Robby Griffin; 1997.