Hi Philip, I had the exact same issue about a year ago. When I added the earth to a scene, my vehicle disappeared. It has to do with OSG computing the near/far clip planes. When it does this, the smaller object often falls outside of the computed viewing frustum. Make sure that OSG is not computing these for you. In OSG 1.2, you could do this with:
osgProducer::Viewer viewer(); ... viewer.getCullSettings().setComputeNearFarMode(osg::CullSettings::DO_NOT _COMPUTE_NEAR_FAR); I am upgrading to OSG2.2 this month, so I don't know how to do it in 2.2 yet. Something to the effect of: osgViewer::Viewer viewer(); ... viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMP UTE_NEAR_FAR); Hope this helps, Justin From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Philip Hahn Sent: Thursday, October 04, 2007 3:46 PM To: OpenSceneGraph Users Subject: [osg-users] relative size of objects in a scene graph Hey guys- Quick question, does the relative size of objects in a scene graph have any effect on culling of objects? Basically I added a rather large object to a scene graph and now a relatively small object no longer appears. The size difference is on the order of 10^6. No code was changed in the visualization, save for adding the larger node. If I manually reduce the size of the large object in half the smaller one reappears, and no, according to the relative positions reported by the PositionAttitudeTransforms it isn't encompassed by the large object. Thanks, Philip Hahn
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