Re: pfEarthSky again

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Angus Dorbie (dorbie++at++sgi.com)
Tue, 13 Jul 1999 12:33:52 -0700

Dirk Scheffter wrote:
>
> pfHi there,
>
> we use Chrystal Eyes with a tracker to produce a holographic image.
>
> To achieve this we set viewOffsets and view frustum (pfChannel::makePersp) each
> frame. The rendering of models itself is like expected. (Somebody can move
> around the model and look at it from different places.)
>
> The only problem we have: If the view frustum is distorted stronglier (due to
> moving out of axis) then mistakes appear near the border of the channel. It
> looks like the width of the earth sky polygons is too small to clear the whole
> channel.
>

Don't use pfEarthSky in a stereo app. It is an approximation. The
horizon is always straight and I can believe it fails of some really
asymmetric frusta.

> Does anybody have any idea how to solve this?
>

Drawing your own sky would be better.

Cheers,Angus.

-- 
For years now, whenever NT has been proven to have some debilitating
weakness we've heard from MS advocates that NT would catch up, there was
just an incredible faith in this OS and Microsoft's ability to somehow
get there. With the recent results of the Linux vs NT serving benchmark
that same attitude can be seen in the Linux community. The Linux folks
aren't too worried, "Sure the single threaded IP stack was slow but
it'll be fixed in the next release.", it's eerily familiar but I have
confidence in the Linux community's ability to remedy problems and I
don't groan in pain as I used to when Microsoft made similar claims.


For advanced 3D graphics Performer + OpenGL based examples and tutors:
http://www.dorbie.com/

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