Warp nous apporta ses lumieres en ce 25/02/2006 06:50:
> Nekar Xenos <go_### [at] yahoocom> wrote:
> 
>>I meant to replace my intitial suggestion with the second one. Is it not 
>>possible to test intersection of a circle with an object? Please excuse me, 
>>but I (obviosly)don't know how a raytracer is programmed. How is 
>>intersection of a straight ray done? I was thinking of just replacing the 
>>formula for the straight ray with the formula of a circle.
> 
> 
>   How would a ray travelling in a circular path be any feasible way of
> emulating variable ior? I'm not even sure it's physically possible to
> have an object with an ior such that light travels in a circular path
> through it regardless of the direction.
> 
Gravity lense, in any direction not directly aimed at it's center. As those don't have
a deffinite 
center (each constituent object been a "center"), ray's paths looks rather like a
drunken man path.

Note to self: I need to create such a lense in POV-Ray one day.

-- 
Alain
-------------------------------------------------
After any salary raise, you will have less money at the end of the month than you did
before.

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