POV-Ray : Newsgroups : povray.binaries.images : September quizz Server Time: 27 Sep 2020 20:40:10 GMT
  September quizz (Message 1 to 8 of 8)  
From: Le Forgeron
Subject: September quizz
Date: 6 Sep 2020 14:42:12
Message: <5f54f544$1@news.povray.org>
Greetings.

What would be the name of the attached shape ?

I mean, simple term, for such thing.


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From: Bald Eagle
Subject: Re: September quizz
Date: 6 Sep 2020 15:25:01
Message: <web.5f54fe80cc0e01fb1f9dae300@news.povray.org>
Le_Forgeron <jgr### [at] freefr> wrote:
> Greetings.
>
> What would be the name of the attached shape ?
>
> I mean, simple term, for such thing.

Hyperboloid?

Catenoid (minimal surface)?

Pulley (wheel)?


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From: Cousin Ricky
Subject: Re: September quizz
Date: 6 Sep 2020 16:55:00
Message: <web.5f551363cc0e01fb60e0cc3d0@news.povray.org>
Le_Forgeron <jgr### [at] freefr> wrote:
>
> What would be the name of the attached shape ?

Spool?  Reel?


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From: Thomas de Groot
Subject: Re: September quizz
Date: 7 Sep 2020 06:22:11
Message: <5f55d193@news.povray.org>
Op 06/09/2020 om 16:42 schreef Le_Forgeron:
> Greetings.
> 
> What would be the name of the attached shape ?
> 
> I mean, simple term, for such thing.
> 

My first thought: pulley.

-- 
Thomas


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From: Bald Eagle
Subject: Re: September quizz
Date: 7 Sep 2020 17:30:00
Message: <web.5f566db9cc0e01fb1f9dae300@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> My first thought: pulley.

My third thought was that it would be what was left when one subtracted away a
torus.
So, a donut hole, or an anti-torus.
Maybe something akin to a "munchkin".   :D

There apparently _IS_ an antitorus, but I can't find a clear description or
illustration of what exactly it is.


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From: Le Forgeron
Subject: Re: September quizz
Date: 7 Sep 2020 17:43:57
Message: <5f56715d$1@news.povray.org>
Le 07/09/2020 à 19:28, Bald Eagle a écrit :
> Thomas de Groot <tho### [at] degrootorg> wrote:
> 
>> My first thought: pulley.
> 
> My third thought was that it would be what was left when one subtracted away a
> torus.
> So, a donut hole, or an anti-torus.
> Maybe something akin to a "munchkin".   :D
> 
> There apparently _IS_ an antitorus, but I can't find a clear description or
> illustration of what exactly it is.

I knew there was an antisphere, an "object" with a constant negative
curvature. (found in pseudosphere in wolfram)


https://mathworld.wolfram.com/Pseudosphere.html

And Thomas is right, the hole of a torus is involved.


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From: Bald Eagle
Subject: Re: September quizz
Date: 7 Sep 2020 18:15:01
Message: <web.5f56784dcc0e01fb1f9dae300@news.povray.org>
https://en.wikipedia.org/wiki/Doughnut#Holes

.... many chains offer their own variety, some with their own brand names such as
"Munchkins" from Dunkin' Donuts and "Timbits" from Tim Hortons.

Perhaps POV-Ray needs a profiterole, chou à la crème, or dare I suggest it - a
"Grimbit"   :D


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From: Bald Eagle
Subject: Re: September quizz
Date: 7 Sep 2020 21:40:05
Message: <web.5f56a897cc0e01fb1f9dae300@news.povray.org>
Spool
bobbin
reel
(tire) rim

....


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