In article <404269a7$1@news.povray.org>,
 Lutz-Peter Hooge <lpv### [at] gmxde> wrote:

> Christopher James Huff <cja### [at] earthlinknet> wrote:
> 
> > BTW, here's a demo of several different integrators and orbit types:
> > http://www.princeton.edu/~rvdb/JAVA/astro/galaxy/Galaxy.html
> 
> Seems to be quite buggy though. Switching between integrators gives 
> inconsistent results: sometimes earth escapes the sun with RungeKutta4
> at warp=500 (I guess it is really using Euler then), sometimes it is
> stable as expected.
> Not very good conditions for comparing the integrators.

True...I only tried a few examples before posting. It's slow 
too...slower than I think it should be, even for a Java program. I've 
done similar simulations with thousands of particles in Sapphire, which 
ought to be quite a bit slower than Java, and they ran quite smoothly.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/

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