Subject:
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Re: DAT to GIF/JPG/EPS
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Newsgroups:
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lugnet.cad
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Date:
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Mon, 22 Jan 2001 15:04:53 GMT
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Viewed:
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868 times
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In lugnet.cad, Erik Olson writes:
> In lugnet.cad, Don Heyse writes:
> > In lugnet.cad, Thomas Keenan writes:
> > > > I toyed with EPS output in the latest version of the ldglite sources, but
> > > > the output files were ENORMOUS. Of course I was just dumping shaded • triangles
> > > > so I suppose a more sophisticated translator would produce more efficient
> > > > EPS files.
> > >
> > > How exactly did you do this, if you don't mind explaining?
> >
> > I pasted some code from here http://reality.sgi.com/opengl/tips/Feedback.html
> > into ldglite. It uses the opengl feedback buffer to grab the primitives
> > and dump EPS instead of rendering them onscreen. It's a neat trick, but not
> > the best way to do it. A better way would be to convert parts instead of
> > just triangles, quads, and lines to EPS.
> >
> > Don
>
> Where does hidden triangle removal happen in this process? Or do you count
> on getting them in proper back-to-front order?
>
> I'm experimenting with a postscript renderer plug-in since about a week ago.
The code at sgi has an option to sort them by depth. It's not perfect though,
and it uses a lot of memory since you have to push ALL the triangles through
the feedback buffer before you sort. That's a lot of triangles and postscript
is quite wordy. I suppose if you could remove all the hidden triangles (or
at least the hidden studs like l3lab) then you might get a reasonable sized
EPS file.
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Message has 1 Reply:
 | | Re: DAT to GIF/JPG/EPS
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| (...) then... (...) What it really wants is not individual triangles, but outline strokes. Always more ideas for projects than time to do them. (23 years ago, 23-Jan-01, to lugnet.cad)
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Message is in Reply To:
| | Re: DAT to GIF/JPG/EPS
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| (...) Where does hidden triangle removal happen in this process? Or do you count on getting them in proper back-to-front order? I'm experimenting with a postscript renderer plug-in since about a week ago. -Erik (23 years ago, 21-Jan-01, to lugnet.cad)
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