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9 Aug 2024 11:20:55 EDT (-0400)
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From: Slime
Subject: Re: Villarceau Artifacts
Date: 20 Mar 2005 15:11:29
Message: <423dd8f1$1@news.povray.org>
> In response to Slime, there are no isosurfaces in the image, only tori
(and
> one plane and one off-camera sphere).

Oh; How were the twisted circle things made?

> Does anyone have any other suggestions?

Sometimes torii have accuracy problems at small sizes; try scaling the
entire scene up by a factor of 10 or so.

 - Slime
 [ http://www.slimeland.com/ ]


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From: Ben
Subject: Re: Villarceau Artifacts
Date: 21 Mar 2005 04:10:00
Message: <web.423e8e3483c96987ec12ceb00@news.povray.org>
"Slime" <fak### [at] emailaddress> wrote:
> > In response to Slime, there are no isosurfaces in the image, only tori
> (and
> > one plane and one off-camera sphere).
>
> Oh; How were the twisted circle things made?

You'd have to ask Tor for a full explanation, but from how I understand the
source, they are each defined by the intersection of one torus (tilted and
translated slightly from the axes of the object itself) and the hollow
toroid shell created by subtracting a small internal torus from a slightly
larger external one. (I hope that makes sense o.O)

I thought it was a clever method, it's part of why I liked the image...

> > Does anyone have any other suggestions?
>
> Sometimes torii have accuracy problems at small sizes; try scaling the
> entire scene up by a factor of 10 or so.

Alright, I shall try that... cheers :)

--
Ben
"They always say time changes things, but you actually have to change them
yourself."
 - Andy Warhol


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