[osg-users] Frame rate hit using OSG 2

Robert Osfield robert.osfield at gmail.com
Fri Sep 7 23:35:31 PDT 2007


On 9/7/07, Gert van Maren <gert at k2vi.com> wrote:
> Hi Donn,
>
> We went across this week and are getting the same. About 40% drop in
> framerate with certain paged data sets.

Curious.  2.x and 1.2 are still fundamentally the same scene graph.
CullVisitor and DatabasePager changed little in the 1.2 to 2.0 period.
 Changes to CullVisitor principally lie in the handling of RTT
Camera's.

Recently I checked in a range of changes to DatabasePager to manage
threading better under Windows, and to add compile context support,
but neither of these I'd expect to see an impact on cull.

In the SVN version there is now default use of mutexes in the
rendering backend which has slowed the cull traversal a bit, this code
is still experimental and subject to further changes.

Robert.



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