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Subject: 
Re: Detemining Polygon Winding (Was: New Plugin for LDDesignPad)
Newsgroups: 
lugnet.cad.dev
Date: 
Thu, 8 Aug 2002 01:04:01 GMT
Viewed: 
2164 times
  
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



Message is in Reply To:
  Re: Detemining Polygon Winding (Was: New Plugin for LDDesignPad)
 
(...) 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 (...) (24 years ago, 8-Aug-02, to lugnet.cad.dev)

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