Re: openGL and Performer

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Angus Dorbie (dorbie++at++sgi.com)
Wed, 20 May 1998 10:13:21 -0700

Craig Materick wrote:
>
> Just wondering if there is a straight-forward way to include an openGL
> rendering routine(which I have) to draw stars as point sources into a
> performer application which draws and animates the various bodies in the
> solar system. Currently, I am mapping a star map to a giant "Universe"
> sphere, but this is slow and not too nice to look at.
>
> Thanks in andvance for any information,
>
> Craig Materick

Add the stars to the scene below a DCS, translate the DCS to the eye
position.
This will have the equivalent graphical effect of drawing at infinity so
you won't
need a huge sphere and will get better values for your CLIP plane
settings.

Disable depth writes and draw first to avoid zbuffer problems.

Cheers,Angus.

-- 
"Only the mediocre are always at their best." -- Jean Giraudoux 


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