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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Fri, 1 Oct 1999 12:41:04 GMT
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Viewed:
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932 times
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On Thu, 30 Sep 1999 16:28:48 GMT, "Gary Williams" <graywolf@pcpros.net>
wrote:
> A hypothetical batch dat fixer program could examine the primitives first
> and flag the ones that were not closed volumes, since those would be the
> only ones that would need to have their reference orientation matrices
> mirrored and rotated.
It wouldn't matter if they were closed-volume or not--they could still be
turned inside out accidently. And an inside-out closed-volume primitive
wouldn't do anybody any good.
> I think there could be problems if some of those non-closed primitives are
> asymmetrical.
Why?
Steve
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Message has 1 Reply:
 | | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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| Steve Bliss wrote in message <37f4ab7d.64002272@l...et.com>... (...) Doh'! You're right. (...) I'm having a difficult time picturing in my mind how an asymmetrical part can have its orientation matrix in the parent dat file mirrored and rotated (to (...) (25 years ago, 1-Oct-99, to lugnet.cad.dev)
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Message is in Reply To:
| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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| John VanZwieten wrote in message ... (...) primitive (...) the (...) ray (...) A hypothetical batch dat fixer program could examine the primitives first and flag the ones that were not closed volumes, since those would be the only ones that would (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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