Subject:
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Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 30 Sep 1999 15:38:09 GMT
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Viewed:
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610 times
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"Lars C. Hassing" wrote:
>
> "enough rays" - exactly what stroke me too when I read Leonardo's posting!
> With the fast computers nowadays we could shoot millions of rays at the
> part from all possible viewing angles (this might even disclose some
> invisible faces! - hm, are these needed when a part is drawn transparently?)
When you draw a part with a pattern transparently, I guess it's not a
good idea to remove the backfaces or you might not see the pattern from
some angles.
> In addition to Leonardo's summary:
> Because the "what is inside/outside" of e.g. 4-4cyli.dat depends on the
> usage, and we don't want two sets of primitives, I think we need to
> decide on a "0 CCW" or "0 FACE CCW" or ?? keyword.
> (see the discussion I started on Feb 4th 1999)
About that discussion, IMO it would be better to have *everything* CCW
instead of adding a keyword. Most primitives can have their faces
changed by using mirroring so we probably won't need to have 2 sets,
only make the current files have the same orientation.
Leonardo
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Message has 1 Reply:
Message is in Reply To:
 | | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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| John VanZwieten wrote in message ... (...) Me too! (...) "enough rays" - exactly what stroke me too when I read Leonardo's posting! With the fast computers nowadays we could shoot millions of rays at the part from all possible viewing angles (this (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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