HI Martin, I can't really work out what exactly is going on from your email. The compute near/far doesn't normally have problems these days, and the values your are reporting suggest that they haven't been set at all - is the scene empty?
As for large numbers, I would always recommend keeping your vertex data with a local origin and using a MatrixTransform above the local subgraph that positions it in the large coordinate frame i.e. Earth Center Earth Fixed. VPB/osgTerrain use this technique to ensure numercial stability during rendering and intersection testing. I would say that this isn't done to avoid near/far issues though as they don't normally arise when handling large coords - you instance sounds pretty odd. Robert. On Thu, Dec 10, 2009 at 9:43 PM, Martin Beckett <[email protected]> wrote: > When displaying a model positioned at real world coords (ie values in 6 > figures) I get an error about "_clampProjectionMatrix not applied" and a > znear of roughly max_float and a zfar of -max_float. > > This only seems to be a problem with vertex data, display osg::shapes at > these coords is fine. > > Is there a simple fix to set the near/far planes to this coordinate system? > > Each part of the scene is in local coords with a PAT node setting the map > coords. Would it help to have a parent map node with the large offset handled > there? > > > Martin > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=21280#21280 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
