Hi everybody.

I just wondered if povray can do absolute reflections? you know, when light
goes from a dense medium to a less dense medium in a high angle the light
bends so much it becomes a reflection instead of a refraction... If it
doesn't support it... well, then it should because it's no hard math and
it's pretty common...

/Anders

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On Wed, 28 Apr 1999 17:14:31 +0200, Anders Haglund wrote:
>Hi everybody.
>
>I just wondered if povray can do absolute reflections? you know, when light
>goes from a dense medium to a less dense medium in a high angle the light
>bends so much it becomes a reflection instead of a refraction... If it
>doesn't support it... well, then it should because it's no hard math and
>it's pretty common...

I think when I learned this concept they called it "Total Internal Reflection."
If it's the same thing you're thinking of, then yes it is supported.

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Ron Parker <par### [at] my-dejanewscom> wrote:
: I think when I learned this concept they called it "Total Internal Reflection."
: If it's the same thing you're thinking of, then yes it is supported.

  Now I understand why my objects inside glass objects are reflected on
the inner walls of the glass objects although there's no reflection finish.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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I got the same effect using ior in my waves project and in the end gave up
using ior.

Mick
Nieminen Mika <war### [at] cctutfi> wrote in message
news:37275112.0@news.povray.org...
> Ron Parker <par### [at] my-dejanewscom> wrote:
> : I think when I learned this concept they called it "Total Internal
Reflection."
> : If it's the same thing you're thinking of, then yes it is supported.
>
>   Now I understand why my objects inside glass objects are reflected on
> the inner walls of the glass objects although there's no reflection
finish.
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Make a checkered plane. Put a camera above it.  Make a transparent plane above
the camera with ior 1.33.  Point the camera up.  You should see where the
critical angle is reached.

In real life the area where TIR is reached is a little more gradual, I think,
so it might not be completely accurate.

-Mike

Anders Haglund wrote:

> Hi everybody.
>
> I just wondered if povray can do absolute reflections? you know, when light
> goes from a dense medium to a less dense medium in a high angle the light
> bends so much it becomes a reflection instead of a refraction... If it
> doesn't support it... well, then it should because it's no hard math and
> it's pretty common...
>
> /Anders

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