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 17:54:51 GMT
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Viewed:
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917 times
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Steve:
> > Then STUD2.DAT could use:
> > 0 CCW
> > 1 16 0 -4 0 4 0 0 0 4 0 0 0 4 4-4cyli.dat
> > 0 CW
> > 1 16 0 -4 0 6 0 0 0 4 0 0 0 6 4-4cyli.dat
>
> Why not simply:
> 1 16 0 -4 0 -4 0 0 0 4 0 0 0 4 4-4cyli.dat
> 1 16 0 -4 0 6 0 0 0 4 0 0 0 6 4-4cyli.dat
>
> Assuming the primitives are all defined so their faces are turned outward.
Because our clever rendering programs will notice that the
first transformation matrix has negative determinant, and
therefore will swap the CW and CCW checks.
Play well,
Jacob
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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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| (...) Why not simply: (...) Assuming the primitives are all defined so their faces are turned outward. I would see allowing both CW and CCW as a convenience for parts authors. There's no real difference between one way and the other. CW has a slight (...) (25 years ago, 1-Oct-99, to lugnet.cad.dev)
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