POV-Ray: Newsgroups: povray.newusers: negative IOR

POV-Ray : Newsgroups : povray.newusers : negative IOR		Server Time 25 Nov 2024 15:28:50 EST (-0500)

From: Sorc
Subject: negative IOR
Date: 9 Aug 2005 16:20:01
Message: <web.42f90f8d747633336421e73c0@news.povray.org>

Hi,
is there a way to implement a negative ior? It should be easy to implement
it, because snells law is still valid (the light is just refracted to the
"wrong" side).
Povray limits the ior to values > 1.0 as far as I know.

Any ideas?


thx
Sorc

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From: Mike Williams
Subject: Re: negative IOR
Date: 9 Aug 2005 16:29:47
Message: <IG8BeGA1IR+CFwSK@econym.demon.co.uk>

Wasn't it Sorc who wrote:
>Hi,
>is there a way to implement a negative ior? It should be easy to implement
>it, because snells law is still valid (the light is just refracted to the
>"wrong" side).
>Povray limits the ior to values > 1.0 as far as I know.
>
>Any ideas?

I thought it allowed IOR to be less than 1.0, but if not, you can
certainly invert your shape and fill the rest of the universe with a
higher IOR value. Only the difference in the IOR values at the interface
are significant for determining the angle of refraction.

-- 
Mike Williams
Gentleman of Leisure

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From: Christoph Hormann
Subject: Re: negative IOR
Date: 9 Aug 2005 17:20:01
Message: <ddb6kg$nu6$1@chho.imagico.de>

Sorc wrote:
> Povray limits the ior to values > 1.0 as far as I know.

So you suggest this without actually trying?  Not a good idea...

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.tu-bs.de/~y0013390/ (Last updated 24 Jul. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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