POV-Ray: Newsgroups: povray.binaries.images: Looking for a fractal name

POV-Ray : Newsgroups : povray.binaries.images : Looking for a fractal name		Server Time 24 Dec 2024 08:39:48 EST (-0500)

From: BayashiPascal
Subject: Looking for a fractal name
Date: 23 May 2020 03:55:01
Message: <web.5ec8d5c9d3f9fb8abf64454a0@news.povray.org>

I was discussing about this fractal yesterday with a friend but couldn't
remember its name. Luckily I remember its shape enough to be able to reproduce
it with Pov-Ray.
Does anyone here happen to know its name ?

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Download 'fractal.png' (121 KB)

Preview of image 'fractal.png'
$fractal.png$

From: BayashiPascal
Subject: Re: Looking for a fractal name
Date: 24 May 2020 06:30:01
Message: <web.5eca4b936708d837bf64454a0@news.povray.org>

So, someone could inform me: it's an Alexander horned sphere. And my memory was
faulty, there is a 90 degrees relative rotation between the left and right arms.
Still not too bad considering last time I've seen it was 20 years ago :-)

"BayashiPascal" <Pas### [at] BayashiInJapannet> wrote:
> I was discussing about this fractal yesterday with a friend but couldn't
> remember its name. Luckily I remember its shape enough to be able to reproduce
> it with Pov-Ray.
> Does anyone here happen to know its name ?

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From: jr
Subject: Re: Looking for a fractal name
Date: 25 May 2020 05:50:00
Message: <web.5ecb93d46708d8374d00143e0@news.povray.org>

hi,

"BayashiPascal" <Pas### [at] BayashiInJapannet> wrote:
> So, someone could inform me: it's an Alexander horned sphere. And my memory was
> faulty, there is a 90 degrees relative rotation between the left and right arms.
> Still not too bad considering last time I've seen it was 20 years ago :-)

so glad you remembered (and posted) the name.  I lost a pleasant hour or so on
Google Image searches, with search terms like "fractal horseshoe twist".  :-)

regards, jr.

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From: BayashiPascal
Subject: Re: Looking for a fractal name
Date: 26 May 2020 06:35:01
Message: <web.5eccefe56708d837bf64454a0@news.povray.org>

Actually, someone even had already done an animation about it using Pov-Ray !!

https://www.youtube.com/watch?v=Pe2mnrLUYFU



"jr" <cre### [at] gmailcom> wrote:
> hi,
>
> "BayashiPascal" <Pas### [at] BayashiInJapannet> wrote:
> > So, someone could inform me: it's an Alexander horned sphere. And my memory was
> > faulty, there is a 90 degrees relative rotation between the left and right arms.
> > Still not too bad considering last time I've seen it was 20 years ago :-)
>
> so glad you remembered (and posted) the name.  I lost a pleasant hour or so on
> Google Image searches, with search terms like "fractal horseshoe twist".  :-)
>
>
> regards, jr.

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