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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1018 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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![](/news/x.gif) | | 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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53 Messages in This Thread: ![CW/CCW, vertex sequence, co-planar, convex, (115kB) -Lars C. Hassing (29-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Leonardo Zide (29-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -John VanZwieten (29-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Lars C. Hassing (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -John VanZwieten (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -John VanZwieten (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (1-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Bram Lambrecht (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (4-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (4-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (5-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (5-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Lars C. Hassing (8-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Leonardo Zide (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Lars C. Hassing (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jacob Sparre Andersen (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -John VanZwieten (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Leonardo Zide (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jeff Boen (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Leonardo Zide (1-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jacob Sparre Andersen (1-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Gary Williams (1-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (1-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![You are here](/news/here.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jacob Sparre Andersen (3-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (4-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jeff Boen (29-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Steve Bliss (30-Sep-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Leonardo Zide (30-Sep-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex, (115kB) -Jeff Boen (1-Oct-99 to lugnet.cad.dev)](/news/x.gif)
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![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -John VanZwieten (4-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Gary Williams (4-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Lars C. Hassing (8-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Jacob Sparre Andersen (8-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Lars C. Hassing (8-Oct-99 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Steve Bliss (8-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Lars C. Hassing (9-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Steve Bliss (11-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Lars C. Hassing (11-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Steve Bliss (13-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Lars C. Hassing (14-Oct-99 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: CW/CCW, vertex sequence, co-planar, convex -Steve Bliss (15-Oct-99 to lugnet.cad.dev)](/news/x.gif)
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