Subject:
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Re: Some Words To BFC
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 5 Apr 2000 16:41:57 GMT
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Viewed:
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2568 times
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> Because we have intersecting faces and non explicit connected
> faces (ex: studs in parts)
>
> look at this cut of a 3005.dat
> _____
> | |
> -----------
> | ------- |
> |_| |_|
> ^
> |
> |
>
> Now if you shoot a ray along the vertical that passes in the midel of the
> stud (point 0,0,0 ), how many faces do you have there ?
> 3, so it's Odd, and you don't know if the part/piece is incorrect or just if
> you should assume that all volume between the 3 faces should be considered
> interior volume, and what about if you have 5 faces ?
This points out that ray traced renderings of the transparent version of these
pieces will not render the refraction correctly. In the best of all worlds,
the interior surface would be removed. For ray tracing, the model could be
replaced with a CSG version when primitive substitution is added to POV
converters.
-Chuck
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Message is in Reply To:
 | | Re: Some Words To BFC
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| (...) That's is the (Odd/Even) test, also with Raycasting, but no supersampling, in the supersampling case, you just subdivide the polys further and further, or shoot pseudo-random rays until you find the correct normals for all faces. this does NOT (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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