Subject:
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Re: CW/CCW, vertex sequence, co-planar, convex
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Newsgroups:
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lugnet.cad.dev
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Date:
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Fri, 15 Oct 1999 13:25:58 GMT
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Viewed:
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1305 times
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On Thu, 14 Oct 1999 12:49:11 GMT, "Lars C. Hassing" <lch@ccieurope.com>
wrote:
> I agree with Gary Williams that the CLIPPING is somewhat redundant.
> CLIPPING ON/OFF could be accomplished by WINDING CW/UNKNOWN.
> The CLIPPING is "syntax sugar", not a functional requirement.
Disagree. Being able to turn clipping on and off separately from
specifying the direction of winding is a functional difference, not 'syntax
sugar'.
> But we should find a way that is easy and logical for part authors
> (because FACE CW/CCW/OFF would be enough from the program's view!)
>
> I believe the presence of WINDING/CLIPPING makes a part certified.
> If some sections of the part has not been checked yet, it can be
> indicated by WINDING UNKNOWN or CLIPPING OFF around the sections.
OK.
Steve
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Message is in Reply To:
 | | Re: CW/CCW, vertex sequence, co-planar, convex
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| Steve Bliss wrote... (...) Yes, rendering programs should have these reasonable options. But I think it is safe to start clipping from opaque certified parts. (...) Parts are objects with obvious orientation. You are not in doubt what is (...) (25 years ago, 14-Oct-99, to lugnet.cad.dev)
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