Hi Jason, This change would be appropriate. Although we might want to review the eye point management, and perhaps eye + view points as potentially they aren't the same. An stack for eye/viewpoint point might be need as well to cope with internal camera nodes.
Robert. 2009/3/18 Jason Beverage <[email protected]> > Hi Robert, > > I'm using LOD's in one of my apps to control the distance at which models > first begin to appear and noticed that the IntersectionVisitor will still > hit these nodes even if they are not visible. > > I tried setting the LODSelectionMode to > USE_EYE_POINT_FOR_LOD_LEVEL_SELECTION but it still selected invisible > nodes. After looking through the code I noticed that the > getDistanceToViewPoint function is used by the LOD class but is not > implemented by the IntersectionVisitor, so will always have the value of 0. > > I made a small class deriving from IntersectionVisitor that just returned > getDistanceToEyePoint (which is overriden by IntersectionVisitor) and things > seemed to behave more appropriately. > > class MyIntersectionVisitor : public osgUtil::IntersectionVisitor > { > public: > MyIntersectionVisitor(osgUtil::Intersector* intersector=0, > osgUtil::IntersectionVisitor::ReadCallback* readCallback=0) > :IntersectionVisitor(intersector, readCallback) > { > } > > virtual float getDistanceToViewPoint(const osg::Vec3& pos, bool > useLODScale) const > { > return getDistanceToEyePoint(pos, useLODScale); > } > }; > > Would this change, or something similar, be appropriate for inclusions in > OSG? > > Thanks! > > Jason > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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