[osg-users] setLODScale affecting near far planes?
pmartz at skew-matrix.com
Fri Sep 19 15:57:18 PDT 2008
Do you get the same behavior when viewing your database in osgviewer and
hitting the * and / keys?
> Hi all,
> I am getting this rather weird effect when playing with the
> setLODScale values in my application. I have a large pagedLOD
> terrain, with near/far planes culling mode enabled for my
> camera, and I am looking at a certain direction in the scene.
> I added osg's lod scale handler so that I can modify the
> value interactively (with the * and / keys, just like in
> osgviewer) and it turns out that as I change that value, and
> I dump my application's debug information, I notice the the
> near/far planes do not remain constant, although I am not
> moving around the scene and I am always looking in the same
> direction. This causes problems because the clipping planes
> change as a result of changing the LOD scale and my non-LOD
> objects beyond the planes get culled. I don't think that the
> clipping planes should change at all if I am not moving my
> camera. I should still see the objects that are within a
> constant near/far distance, and I should only observe
> different level of detail on the LOD objects as I change the
> scale. What am I missing here?
> I am using osg.2.6.0 on a 64bit intel linux machine. Thanks,
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> osg-users at lists.openscenegraph.org
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