Subject:
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Re: Detemining Polygon Winding (Was: New Plugin for LDDesignPad)
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 8 Aug 2002 01:29:02 GMT
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Viewed:
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682 times
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In lugnet.cad.dev, Orion Pobursky writes:
> In lugnet.cad.dev, Don Heyse writes:
> > I wouldn't bother. This well known algorithm is based on an assumption
> > that simply isn't true for the parts files. The assumption is that there
> > is one single enclosed space inside of each part. But I think the studs
> > are open at one end and are positioned with the open end on top of another
> > surface. This breaks the algorithm.
>
> Yes but I'm not parsing primitive subfiles in my plugin, just quads and
> triangles.
OK, but if the quads and triangles don't form a single closed surface,
or actually a bunch of closed surfaces, then the algorithm won't work.
However, like I said, if you find something that works, post the code
or the algorithm and you'll be my hero. I don't think I'll ever add
code to parse the BFC meta-commands in ldglite. (I just don't like
them). But I will add code that BFCs parts automatically if someone
comes up with it.
Don
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