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 01:04:01 GMT
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Viewed:
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570 times
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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.
>
> I think Leonardo whipped up some java code to do this a while back but
> got stuck at the same place. Too bad. If we had a nifty algorithm we
> could do this when parsing the parts and eliminate the need to pollute
> the files with all that silly BFC stuff.
>
> If you come up with a method that works, post the algorithm and do us
> all a huge favor.
I love searching lugnet for neat old stuff...
http://news.lugnet.com/cad/dev/?n=2945
I can't remember if any working code ever came out of this 3 year old
thread, but this *is* a nifty sounding algorithm. If I were working
on that plugin, I'd probably go back and read the entire thread to see
what the results were.
Have fun,
Don
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