Subject:
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Re: CW compliancy
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Newsgroups:
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lugnet.cad
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Date:
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Fri, 20 Oct 2000 06:28:21 GMT
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Viewed:
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1144 times
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Most of the ones I've seen that refer to CW compliancy say "not
CW-compliant". This is because--to the best of my knowledge--the ones that
are compliant should say something like:
0 BFC CERTIFY CW
This means that all the quads and triangles in the file are specified in
clockwise order, (CCW, or nothing at all is used for counter-clockwise
order, since CCW is the default). This allows renderers which support the
extension (such as L3Lab and MLCAD, but not--for the moment at
least--LDView) to not draw quads and triangles which are facing away from
the viewer. This is referred to as "back-face culling" (hence BFC).
If you do a search for BFC on the lugnet.cad.dev newsgroup, I believe you
will find a number of threads that talk about BFC compliance.
--Travis Cobbs (tcobbs@san.REMOVE.rr.com)
"Paul Easter" <pneaster@knoxy.net> wrote in message
news:G2pMLw.HKI@lugnet.com...
> "CW compliant" I have seen this is a few parts now.
> I do not want to start up an old debate here. Can someone point me to a
> posting or web site that explains what this is?
>
> Thank you,
>
> Paul
>
>
> http://www.geocities.com/pneaster/lego_parts.htm (finished parts)
> http://www.geocities.com/pneaster/lego_todo.htm (in process)
> http://www.geocities.com/pneaster/lego_todo2.htm (planned)
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Message is in Reply To:
 | | CW compliancy
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| "CW compliant" I have seen this is a few parts now. I do not want to start up an old debate here. Can someone point me to a posting or web site that explains what this is? Thank you, Paul (URL) (finished parts) (URL) (in process) (URL) (planned) (24 years ago, 20-Oct-00, to lugnet.cad)
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