POV-Ray: Newsgroups: povray.binaries.animations: Chaos II [~500kb]

POV-Ray : Newsgroups : povray.binaries.animations : Chaos II [~500kb]		Server Time 3 Jul 2024 02:57:34 EDT (-0400)

From: Orchid XP v2
Subject: Chaos II [~500kb]
Date: 20 Aug 2005 16:46:16
Message: <43079698@news.povray.org>

Same animation as before. I coded it from scratch, and... it came out 
differently. I suspect what I've done is set the magnet coordinates 
differently or given then a slightly different strength or something, 
resulting in a different image.

The animation I got the first time round was *very* noisy. I did wonder 
if it was to do with the precition of the numbers in the save file. But 
I recorded to not use one, and it still looked the same.

...then I changed the time step, and all the artifacts got smaller.

The movie you're seeing has 25 fps, but computes 8 steps per frame for 
the physics simulation. Anything less than that and you see "waves" 
round the sides - and sparkling noisy areas exactly between the magnets. 
(IOW, where the system is most unstable!) The whole thing uses Euler's 
method; I really must learn about RK4 sometime...

Rendered at 160x160. Took about 5 hours. AMD Athlon64 (in 32-bit mode!) 
3500+. Has 1GB RAM - not that it used any of it! Windows XP Pro.

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Download 'chaos-2b-8x-cut-low.m1v.mpg' (582 KB)

From: Orchid XP v2
Subject: Re: Chaos II [~500kb]
Date: 22 Aug 2005 16:46:22
Message: <430a399e$1@news.povray.org>

> Rendered at 160x160. Took about 5 hours. AMD Athlon64 (in 32-bit mode!) 
> 3500+. Has 1GB RAM - not that it used any of it! Windows XP Pro.

I don't suppose anyone cares, but... yesterday I did it at twice that 
resolution. Took 10 hours - 9:51 parsing, 9 minutes rendering.

I think perhaps a compiled language would go faster... It's not like I'm 
actually using POV-Ray's 3D capabilities in any way...

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