Subject:
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Re: Hidden surface removal, and vertex order in part/primitive DAT files
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 30 Sep 1999 23:29:29 GMT
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Viewed:
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536 times
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Gary Williams wrote in message ...
> Assuming (after all close vertices are matched up) that no polygons have
> zero neighbors, after determining the orientation of one polygon, you could
> visit each neighboring polygon (somewhat like a flood fill algorithm) and
> determine its orientation easily. Only one ray would be needed in the
> entire process.
Okay, I made a bad assumption there, since a group of polygons may terminate
flush against another polygon, without touching its edges. But still I
think a performance improvement could be realized by using a flood-fill-type
algorithm to visit as many polygons per ray as possible.
-Gary
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