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In lugnet.cad.mlcad, Michael Lachmann wrote:
> "Don Heyse" schrieb im Newsbeitrag news:HHrE7q.1vCq@lugnet.com...
> > I'm a bit behind on this thread, but thanks Michael. That explains
> > a lot. I never thought of the image buffering approach for orthographic
> > displays. It's a really neat idea! I do have a question though. How
> > do you handle colors in the image buffers? I guess the image buffers
> > don't go with the cached parts, but with a colored instance of the part?
> > Or do you add the color when you adjust to the final Z values?
> >
> > I can imagine using precalculated images would do wonders for rendering
> > all the studs in an orthographic projection. Have you thought about
> > using Lars' bounding box occlusion test for eliminating needless stud
> > drawing in pespective renderings?
>
> The image buffers, just keep the light information in it,
> but not the color itself, the color is assigned
> during pasting the image onto the screen.
Yes, that makes sense. Hey, I did a little searching and found some
references to "depth sprites" which seem to be supported in some of the
latest graphics hardware. I haven't read it yet, but the pictures in
this article seem to indicate that it can even work in a perspective
projection.
http://www.cs.unc.edu/~ibr/pubs/oliveira-sg2000/RTM_low_res.pdf
I'll have to read it and figure out what they're doing with the bricks.
Just the fact that they seem to be doing something for "bricks" makes it
sound really tempting.
Enjoy,
Don
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Message is in Reply To:
 | | Re: Some secrets of MLCad revealed ...
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| Hi Don, "Don Heyse" schrieb im Newsbeitrag news:HHrE7q.1vCq@lugnet.com... (...) The image buffers, just keep the light information in it, but not the color itself, the color is assigned during pasting the image onto the screen. I think I haven't (...) (21 years ago, 9-Jul-03, to lugnet.cad.mlcad)
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