Re: Display Lists

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Rama Bindiganavale (rama++at++bambi.cis.upenn.edu)
Thu, 15 Jun 1995 11:57:55 -0400

On Jun 15, 11:35am, John Orrange wrote:
> Subject: Re: Display Lists
> >I am new to performer and have this basic question.
> >
> >How do I access data stored in the Display Lists?
> >
> >More specifically, in either the pre or post draw callbacks, how do I access
> >the data (specifically the geometry) from the display lists (created at the
end
> >of the cull traversal), which I assume would correspond only to the part of
the
> >scene visible within the viewing frustum?
> >

> See the man pages for :
>
> pfGetGSetAttrLists()
> pfGetGSetAttrBind()
>
> and the like....
>
> hope this is what you were looking for...
>
> (J)
>-- End of excerpt from John Orrange

Thank you for your reply. But I still have a few questions on the same topic.
For pfGetGSetAttrLists(), we need to specify the geosets. Now how do I
know whether the geoset or the geode containing it is within the viewing
frustum? I mainly want a list of all the data points or nodes which are within
the viewing frustum. I know that the culltraversal does this. But how
do I read the resulting output display list of the cull traversal?

Thanks
Rama

-- 
---------------------------------------------------------------------
Rama Bindiganavale
rama++at++graphics.cis.upenn.edu
http://www.cis.upenn.edu/~rama/home.html

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