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Chris B nous apporta ses lumieres en ce 2008/02/15 03:44:
> "thisroad" <nomail@nomail> wrote in message
> news:web.47b4fdb672c7bea14915bbf10@news.povray.org...
>> Triple_R, thanks for the input! I'll play around with that and see what
>> happens. It seems like there would be a simple way to create this --
>> maybe
>> differencing this sphere with one that's marginally smaller would work.
>>
>
> If you want to see the two rings where the surfaces of the sphere and the
> cylinder touch you'll need to give them some thickness. Yes, you can do this
> for the sphere by differencing a smaller sphere. You can do the same for the
> cylinder by differencing it with another cylinder of a smaller radius.
>
> intersection {
> difference {
> sphere {...} // Big Sphere
> sphere {...} // Smaller Sphere
> }
> difference {
> cylinder {...} // Big Cylinder
> cylinder {...} // Smaller Cylinder
> }
> }
>
> You shouldn't need the 'open' keyword on the cylinder.
>
> Regards,
> Chris B.
>
>
Make the inside cylinder a bit longer than the outer one. If they are the same
length, you'll have coincident surfaces at each ends.
--
Alain
-------------------------------------------------
You know you've been raytracing too long when your source files are starting to
get bigger than the image files.
-- Matt
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