Hi Torben,
There isn't a pre callback, and there really isn't any need as you
have complete control over the frame loop - and you can subclass from
osgViewer::Viewer/CompositeViewer and override the various
*Traversal() methods. Personally I'd just expand the frame loop to
look like:
while(!viewer.done())
{
do_my_custom_pre_frame_work();
viewer.frame();
}
Or expand frame() further:
while(!viewer.done())
{
do_my_custom_pre_frame_work();
viewer.advance();
do_my_before_event_work();
viewer.eventTraversal();
do_my_before_update_work();
viewer.updateTraversal();
do_my_before_rendering_work();
viewer.renderingTraversals();
}
Robert.
On Mon, Aug 16, 2010 at 12:37 PM, Torben Dannhauer
<[email protected]> wrote:
> Hi,
>
> Does OSG provide a Callback ("preFrame callback") which is called at the
> beginning of each frame, prior to the event callback or any osg calculation?
>
> Of course I could place my preFrame calls in the main rendering loop prior to
> any traversal, but it would be more clear to use such a callback, otherwise
> the mainloop would be polluted by code for several modules which are not
> loaded in all configurations.
>
> Thank you!
>
> Cheers,
> Torben
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=30771#30771
>
>
>
>
>
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>
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