Hello Hagen,

Kaiser, Hagen wrote:
> In my Application I have rooms and fixed camera-positions.
>...
> I once load all Objects in a room. Then I look whether the object is
> visible from a camera-viewpoint.
> I mark them in our database.
> The next time I try to load a "Camera-Viewpoint" I don't have to load
> all the objects in the room but only the visible objects.
> So I can speedup loading.
> 
> If I would want to write a custom visitor I need to get this polytope
> somehow out of the actual cam-parameters and the do some manual testing.
> Do you have some hints for that?

Check out osgSim::VisibilityGroup as well as PagedLOD.
They may already do what you need i.e. select the visible room and loading it.

Something like VG -> P_LOD -> roomGroup

Cheers,
/ulrich

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