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From: Andreas Freise <adf@mpq.mpg.de>
Subject: Re: Simply illusions
Date: 1997/12/06
Message-ID: <3489CE22.5731@mpq.mpg.de>#1/1
X-Deja-AN: 295854980
References: <66bllo$fvj@newstoo.ericsson.se> <3489A50A.3628@slip.net>
Organization: Rechenzentrum der Max-Planck-Gesellschaft in Garching
Newsgroups: alt.ascii-art


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Randy Gardner wrote:
> >          ___         ____
> >       .'|   |      .'\  /
> >     .'  |___|    .'   \/
> >   .'  .'   .'  .'    .'
> > .'__.'   .'  .'    .'
> > |   |  .'   /\   .'
> > |___|.'    /__\.'    (PS)
> 
> I could make those, they are not illusions.
[snip]
> Anyway, I think you get the idea.

No, sorry I don't.

There are two different kinds of illusions. First :
    __________________
   /_________________()
   |  ________________
   |  | |____________()
   |  |/______________
   |_________________() Unknown artist

The illusion in it comes from the simple fact that
the surfaces are not closed, ie are not surfaces.

Second :

           _____
          /    /\
         /    /  \
        /    /    \
       /    /  /\  \
      /    /  /  \  \
     /    /  /\   \  \ 
    /    /  /  \   \  \
   /    /__/____\   \  \
  /              \   \  \
 /________________\   \  \
 \_____________________\ / Jugg and Grim


This actually can be 'build', cause it is only an illusion
if it's meant to be 3D. But even in 3D you can build it that
seen only from one angle it looks like that. 

Still I'd call the 'impossible' triangle an illusion 
because it suggests an impossible object. But that also
counts for the above pictures by PS.

(And for those who haven't seen the 'impossible' triangle
in reality, I've a picture attached which shows the idea.)


:)                                           (    
Andreas                                     (  ) 
                      .___.            ,-.  __)      NC + a:f   
       \|/           //===\\        ,-' o `-!| 
     .'+^+`.        //=|_|=\\    ,-'---------`-.
   .'///|\\\`.     //=======\\    | [+]   [+] |   .-------------.
  //////|\\\\\\   //|||'"`|||\\   |    ___    |  <   huff, puff  >
 /((|||^..|||))\  |||||.^ |||||   |   |   |  //   `--v----------'
  ((|||(oo)|||)   |||||o) |||||   |   |'  |  |..~~~O 
                                            {   ~vv' 
  ASCII Dictionary :                          |
  - http://www.stud.uni-hannover.de/~freise  >O<  
 
  Alt.Ascii-Art FAQ : 
  - http://www.stud.uni-hannover.de/~freise/ascii/faq.html

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