Hi Daniel,
Daniel Sperka wrote:
> Hi -
>
> Can someone please explain the difference between
>
> viewport->draw(drawAction)
>
> and
>
> viewport->render(renderAction)
>
> Is there a performance advantage in either of these methods?
>
> The drawEnter methods I've looked at all appear to work directly with
> the gl matrices. The renderEnter methods appear to work with a separate
> set of matrices contained in the RenderAction.
>
> What is the difference between draw and render, and can you identify a
> situation where you'd use one over the other?
I would always use render. The DrawAction is a leftover from pre-1
times, it was a simple test implementation to make the system render
anything. It is totally going away in 2. As you see it is a very
straightforward traverse-draw loop that does no optimization whatsoever.
The RenderAction does all the things you need to do to get good
performance (state sorting, visibility culling, occlusion culling etc.),
so don't bother thinking about the DrawAction.
Dirk
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys -- and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Opensg-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensg-users
