Hi Sebastian, Simply do use a MatrixTransform (or other Transform node) above the subgraph you want to place in the scene, keep the subgraph with a local origin use the transform to place the subgraph in it's final ECEF coordinates. This is basically the same approached used by osgTerrain/VPB to avoid precision issues.
Robert. On 11 December 2013 10:41, Sebastian Messerschmidt < [email protected]> wrote: > Hi folks, > > I was thinking if I could improve precision and z-fighting issues for my > geocentric database (built with VPB) by placing models differently. > Right now I'm using a pickvisitor to get the geocentric position on the > terrain and place the model directly by putting it in the root of the scene > with absolute coordinates. > Is there some clever way to put it relative to the terrain-tile, so the > precision is better than using absolute placing? > Bonus would be If the models could stay at their separate group somehow. > > I'm having this idea, since the osg::Terrain is doing the high-precision > matrix calculation inside the graph, presenting a ModelViewMatrix with > relatively low values. > > P.S. I cannot use osgEarth here really, as the database is built with VPB, > and I need superfast loading times. > > > cheers > Sebastian > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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