Very Computer

Hi again....

So it turned out snell's law was alright. What I ment to ask was, if it was
a cheap approximation. It just sorta came out wrong.

With the help of Blancmange, I now have it running. Please take a look at
the animation on my webpage, and let me know if you think it looks correct.
I'm still in boubt.

http://www.goodwill.dk/MRay click animations, and then the top animation.
It's available in Divx and Mpeg.

Thanks

It's not so much a cheap hack as an inexpensive hack. You might want to
search for Cook-Torrence with Google. Here's a pretty page that mentions
Cook-Torrence:

  http://www.cs.unc.edu/~davemc/Class/136/Lecture25/physillum.html

Cheers.

--
   Blancmange

   http://www.airdmhor.gen.nz/blancmange

No, it's actually an accurate model of the geometry of refraction at a
smooth interface. For a quantitative model, you need the Fresnel
equations, as noted earlier in this thread. With these two, you can do
an excellent job modeling glass and similar materials.

Quote:> You might want to
> search for Cook-Torrence with Google.

Or better, Cook Torrance. That will work better :).

Quote:> Here's a pretty page that mentions
> Cook-Torrence:

>   http://www.cs.unc.edu/~davemc/Class/136/Lecture25/physillum.html

But the Cook-Torrance model is a very different animal. First, it
deals with reflection, not refraction. Second, it deals with very
rough surfaces, not smooth surfaces. It is quite useful, but doesn't
have a lot to do with Snell's law.

--
-Stephen H. Westin
Any information or opinions in this message are mine: they do not
represent the position of Cornell University or any of its sponsors.