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Diffstat (limited to 'hacks/config/epicycle.xml')
| -rw-r--r-- | hacks/config/epicycle.xml | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/hacks/config/epicycle.xml b/hacks/config/epicycle.xml deleted file mode 100644 index 18b23df..0000000 --- a/hacks/config/epicycle.xml +++ /dev/null @@ -1,68 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> - -<screensaver name="epicycle" _label="Epicycle"> - - <command arg="-root"/> - - <video href="https://www.youtube.com/watch?v=rpk3zxQxaR8"/> - - <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="ncolors" type="slider" arg="-colors %" - _label="Number of colors" _low-label="Two" _high-label="Many" - low="1" high="255" default="100"/> - - <number id="holdtime" type="slider" arg="-holdtime %" - _label="Linger" _low-label="1 second" _high-label="30 seconds" - low="1" high="30" default="2"/> - - <hgroup> - <number id="linewidth" type="spinbutton" arg="-linewidth %" - _label="Line thickness" low="1" high="50" default="4"/> - - <number id="harmonics" type="spinbutton" arg="-harmonics %" - _label="Harmonics" low="1" high="20" default="8"/> - </hgroup> - - <!-- #### -color0 [red] --> - <!-- #### -colours [100] --> - <!-- #### -foreground [white] --> - <!-- #### -min_circles [2] --> - <!-- #### -max_circles [10] --> - <!-- #### -min_speed [0.003] --> - <!-- #### -max_speed [0.005] --> - <!-- #### -timestep [1.0] --> - <!-- #### -divisor_poisson [0.4] --> - <!-- #### -size_factor_min [1.05] --> - <!-- #### -size_factor_max [2.05] --> - - <boolean id="showfps" _label="Show frame rate" arg-set="-fps"/> - - <xscreensaver-updater /> - - <_description> -A pre-heliocentric model of planetary motion. - -This draws the path traced out by a point on the edge of a -circle. That circle rotates around a point on the rim of another -circle, and so on, several times. - -The geometry of epicycles was perfected by Hipparchus of Rhodes at some time -around 125 B.C., 185 years after the birth of Aristarchus of Samos, the -inventor of the heliocentric universe model. Hipparchus applied epicycles to -the Sun and the Moon. Ptolemy of Alexandria went on to apply them to what was -then the known universe, at around 150 A.D. Copernicus went on to apply them -to the heliocentric model at the beginning of the sixteenth century. Johannes -Kepler discovered that the planets actually move in elliptical orbits in about -1602. The inverse-square law of gravity was suggested by Boulliau in 1645. -Isaac Newton's Principia Mathematica was published in 1687, and proved that -Kepler's laws derived from Newtonian gravitation. - -https://en.wikipedia.org/wiki/Deferent_and_epicycle - -Written by James Youngman; 1998. - </_description> -</screensaver> |
