POV-Ray : Newsgroups : povray.binaries.images : Impossible? (0/1) Server Time
12 Aug 2024 09:22:23 EDT (-0400)
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From: Zeger Knaepen
Subject: Re: Impossible? (1/1)
Date: 2 Nov 2003 16:31:52
Message: <3fa577c8@news.povray.org>
> Among other things, Erhard Ducke wrote:
>
> Great!

No he didn't !


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From: Alf Peake
Subject: Re: Impossible? (1/1)
Date: 2 Nov 2003 17:43:02
Message: <3fa58876@news.povray.org>
Nice one.

But I think Warp beat you to it ;)

From: Warp
Subject: Impossible triangle
Date: 6 Jul 2001 13:09:36 EDT
http://news.povray.org/povray.binaries.images/14136/

From: Alf Peake
Subject: Another triangle 35K
Date: 14 Jul 2001 13:50:50 EDT
http://news.povray.org/povray.binaries.images/14168/


Alf


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From: Aaron Gillies
Subject: Re: Impossible? (1/1)
Date: 2 Nov 2003 21:04:28
Message: <3fa5b7ac$1@news.povray.org>
Let me guess ... It's done with an orthographic camera ...?

Aaron


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From: Hartmut Wagener
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 04:34:50
Message: <3fa6213a$1@news.povray.org>
Aaron Gillies schrieb:
> Let me guess ... It's done with an orthographic camera ...?
> 
> Aaron
> 
> 
That was my thought, too. Some years ago someone posted the famous 
escher-waterfall and posted an other sight of the scene.
How much time must be spend on moving the camera to the right place?

:)

Hartmut


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From: Erhard Ducke
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 06:34:58
Message: <v8fcqvs4avp12216bn7iotrrtkkgej24j0@4ax.com>
On Sun, 2 Nov 2003 22:41:29 -0000, "Alf Peake"
<alf### [at] peake42freeservecouk> wrote:

>But I think Warp beat you to it ;)
No!
I just researched a little and saw that my scenery file is dated Dec
98... 
-- 
Erhard Ducke


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From: Alf Peake
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 09:40:24
Message: <3fa668d8$1@news.povray.org>
"Aaron Gillies" <no### [at] nospamcom> wrote in message
news:3fa5b7ac$1@news.povray.org...
> Let me guess ... It's done with an orthographic camera ...?

In mine, yes. But I don't know how Warp or Erhard did theirs.

Alf


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From: Alf Peake
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 09:40:25
Message: <3fa668d9$1@news.povray.org>
"Erhard Ducke" <duc### [at] gentlemansclubde> wrote in message
news:v8fcqvs4avp12216bn7iotrrtkkgej24j0@4ax.com...
> I just researched a little and saw that my scenery file is dated Dec
> 98...

Sorry. I was a late publisher too :)
I tried to copy a pov triangle that was posted on Compuserve in mid
90s.
In real life, this illusion can be built into a box with a very small
viewing hole.

Alf


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From: Erhard Ducke
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 10:04:26
Message: <qgqcqvojc8v9iadgnic5imrnmbna11ksbv@4ax.com>
On Sun, 2 Nov 2003 22:31:33 +0100, "Zeger Knaepen"
<zeg### [at] studentkuleuvenacbe> wrote:

>How did you do it?

It's made with an orthographic camera, with a perspective view it
would be nearly impossible to adjust the view to the 'real' dices and
the 'fake' ones.

In the attchment you see the same scenery with an added half
transparent plane that is placed *exactly under*  the eight white
dices to show you the trick. The two 'fake dices' are placed *under*
the plane as you can see by the color.
The trick was to cut the upmost dice that is flying above the dices
that lie upon the ground plane is clipped_by a plane that  exactly
touches  the camera location and therefore your pint of view...
Hope this could solve the riddle...
-- 
Erhard Ducke


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Attachments:
Download 'ImpodicePlane.jpg' (23 KB)

Preview of image 'ImpodicePlane.jpg'
ImpodicePlane.jpg


 

From: Erhard Ducke
Subject: Re: Impossible? (1/1)
Date: 3 Nov 2003 10:14:03
Message: <o4scqvcgsrojnl5h9dcsuh5j0efmdio7qt@4ax.com>


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Attachments:
Download 'ImpodicePlane.jpg' (1 KB) Download 'ImpodiceCamShift.jpg' (23 KB)

Preview of image 'ImpodiceCamShift.jpg'
ImpodiceCamShift.jpg


 

From: Alf Peake
Subject: Re: Impossible? New 19K
Date: 3 Nov 2003 16:07:28
Message: <3fa6c390@news.povray.org>
"Erhard Ducke" <duc### [at] gentlemansclubde> wrote in message
news:qgqcqvojc8v9iadgnic5imrnmbna11ksbv@4ax.com...
> On Sun, 2 Nov 2003 22:31:33 +0100, "Zeger Knaepen"
> <zeg### [at] studentkuleuvenacbe> wrote:
>
> >How did you do it?
>
> It's made with an orthographic camera, with a perspective view it
> would be nearly impossible to adjust the view to the 'real' dices
and
> the 'fake' ones.

This was my solution, shown using the default camera.
The plain yellow cube was for a shadow.


Alf


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Attachments:
Download 'blocks.jpg' (19 KB)

Preview of image 'blocks.jpg'
blocks.jpg


 

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