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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Fri, 1 Oct 1999 18:25:47 GMT
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Viewed:
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577 times
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Leonardo Zide wrote in message <37F4ECA7.C0BFCF7D@centroin.com.br>...
> Steve Bliss wrote:
> > I'm willing to change my parts, if the standard changes. Assuming parts
> > which are *not* C(C)W need to be flagged at all.
>
> I guess we could at least decide to use CCW to determine the normal of
> a face, unless there's someone who prefers to use CW ?
I'd vote for CW for two reasons:
1) 'Clockwise' is shorter than 'counterclockwise'.
2) CW is used more often than CCW in rendering applications (to my
knowledge) because the normal of a CW-defined polygon points outward,
instead of inward.
I'd also suggest that the standard comment read '0 CW' instead of '0
CW-compliant'. Less chance for typographical error if the file was created
manually.
Non-compliant parts shouldn't have any tag, IMO, since a file with no tag
wouldn't be treated any different from a file with '0 not CW'. It would be
redundant.
-Gary
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