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From: KalleK
Subject: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 02:25:02
Message: <39bdcc3e@news.povray.org>
Hi!
This is my first post.
It's a geometrical thing i saw in scientifical magazine: two cones with an
inner angle of 90 degree set together, than you cut one half and turn it 90
degree around. There is just one surface - somehow a kind of moebius-thing.
They said, it would be nice to see it rolling. So i made it.
cukk


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Attachments:
Download 'Shericon.mpg' (75 KB)

From: ryan constantine
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 05:15:45
Message: <39BDF447.142DEC8E@yahoo.com>
that's really cool!

KalleK wrote:
> 
> Hi!
> This is my first post.
> It's a geometrical thing i saw in scientifical magazine: two cones with an
> inner angle of 90 degree set together, than you cut one half and turn it 90
> degree around. There is just one surface - somehow a kind of moebius-thing.
> They said, it would be nice to see it rolling. So i made it.
> cukk
> 
>                    Name: Shericon.mpg
>    Shericon.mpg    Type: MPLAYER2 File (video/mpeg)
>                Encoding: x-uuencode


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From: Bob Hughes
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 06:09:49
Message: <39be00ed@news.povray.org>
"KalleK" <kal### [at] gmxde> wrote in message news:39bdcc3e@news.povray.org...
| Hi!
| This is my first post.

And a great first post at that.  Fantastic, intriguing.  I think you made a
really good animation out of something that would seem a mere trifle if not
animated.

| It's a geometrical thing i saw in scientifical magazine: two cones with an
| inner angle of 90 degree set together, than you cut one half and turn it
90
| degree around. There is just one surface - somehow a kind of
moebius-thing.
| They said, it would be nice to see it rolling. So i made it.

I can't imagine how you managed to keep it in contact with that conveyor,
unless it's actually simple.  Looks difficult.  Science is wonderful, isn't
it?  :-)  Rather geometry is at least.
If this had some spotlights revolving around, for example, to keep the scene
unevenly lit it would be a great screen saver (well, screen distracter if
not a "saver").  Plus a much better quality would help.

Bob


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From: Ian Witham
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 07:10:29
Message: <39be0f25@news.povray.org>
"KalleK" <kal### [at] gmxde> wrote in message news:39bdcc3e@news.povray.org...
> Hi!
> This is my first post.
> It's a geometrical thing i saw in scientifical magazine: two cones with an
> inner angle of 90 degree set together, than you cut one half and turn it
90
> degree around. There is just one surface - somehow a kind of
moebius-thing.
> They said, it would be nice to see it rolling. So i made it.
> cukk
>



--

That is excellent! I've never seen that shape before. Welcome aboard BTW ;-)

Ian

Inkwell: Ian's Homepage
http://www.topcities.com/cartoon/inkwell/index.htm


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From: Bill DeWitt
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 07:46:50
Message: <39be17aa@news.povray.org>
"KalleK" <kal### [at] gmxde> wrote in message news:39bdcc3e@news.povray.org...
> Hi!
> This is my first post.
>

    Pretty cool...


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From: Børge Berg-Olsen
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 08:25:53
Message: <39BE20A1.A4950CBC@dod.no>
KalleK wrote:
> They said, it would be nice to see it rolling. So i made it.

Uhm, I got this strange and weird feeling in the back of my head by
looking at it. 

I think it has my spatial sense go wacko - sensory overload, so to
speak.

-- 

------------------------------------------------------------------------
  +47 90 62 71 78          DoD#2101, DoDRT#017, NIC#015, PJ#006, OGM#007
  azo### [at] dodno, Ducati M600, Clementine  Ubesudlet: Aldri eid en J&%#PS.


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From: Josh English
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 11:51:38
Message: <39BE511C.3465F4E6@spiritone.com>
Wow. The movement is great. How did you code this?

Josh

KalleK wrote:

> Hi!
> This is my first post.
> It's a geometrical thing i saw in scientifical magazine: two cones with an
> inner angle of 90 degree set together, than you cut one half and turn it 90
> degree around. There is just one surface - somehow a kind of moebius-thing.
> They said, it would be nice to see it rolling. So i made it.
> cukk
>
>                    Name: Shericon.mpg
>    Shericon.mpg    Type: WMPLAYER File (video/mpg)
>                Encoding: x-uuencode

--
Josh English -- Lexiphanic Lethomaniac
eng### [at] spiritonecom
The POV-Ray Cyclopedia http://www.spiritone.com/~english/cyclopedia/


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From: Libellule
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 20:08:43
Message: <39BEC5D6.A0470711@insectes.net>
> I think it has my spatial sense go wacko - sensory overload, so to
> speak.

Clear the decks! He's going to explode!
;)


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From: Tony[B]
Subject: Re: rolling sphericon (74,3KB bu)
Date: 12 Sep 2000 20:55:42
Message: <39bed08e@news.povray.org>
<wharf!> Uhh... How did you do that?!


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From: KalleK
Subject: Re: rolling sphericon (74,3KB bu)
Date: 13 Sep 2000 02:49:32
Message: <39bf237c@news.povray.org>
Hi!

The movement of the sphericon is a combination of rotation, translation and
calculation (bad math - i guess. it's not the easiest way...) in 4 steps.
The movement of the conveyor is just a pigment movement - gradient and
radial - it's a fake...

If you want to, i can post the code. (but it's a little mess...)
KK

Josh English wrote:
> Wow. The movement is great. How did you code this?


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