Subject:
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Re: Several replies to CLIPPING / WINDING
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 20 Oct 1999 10:45:20 GMT
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Reply-To:
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rui.martins@link.STOPSPAMMERSpt
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Viewed:
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428 times
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On Tue, 19 Oct 1999, Leonardo Zide wrote:
> "Lars C. Hassing" wrote:
> >
> > Wait a minute, you were not going to actually send winding state changes
> > to the graphics engine?
> > Simply keep track of the state yourself and send either vertices 1,2,3
> > or 3,2,1.
> > The part author can use as many WINDING CW/CCW as he likes
> > - it won't hurt performance a bit!
>
> Sure, that can be done but there's the "0 UNKNOWN" or "0 DOUBLE-SIDED"
> case, and you'd have to send the triangles twice if you don't want to
> change the state.
>
> Leonardo
That can be done, but you will probably suffer a performance hit,
because, most hardware, just use a bit, to keep track of the state.
Just minimize the use of the
0 CCW and 0 CW meta-commands, to boost performance.
When optimizing existent or new files, try do define all the polygons,
using the same winding (that's not hard to do), and if you think that
takes a lot of time, after creating the .DAT file, jut run one of those
utilities, that correct the file for you, preferably makeing then all
the default (CCW).
Rui Martins
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