Thanks, that was what I was looking for, I'll try what I can and post my results/solution. However, if anyone has a better solution, I would appreciate it.
-Alan Marcus Lindblom wrote: > Since no-one answered this, I can give my 0.02SEK. :) > > Splitting the rendering is probably the way to go. Use two cameras with > identical beacons but different near/far planes. That way, you'll avoid > checking node's distances and so on. OpenSG will do the frustum culling > automatically (assuming you haven't disabled it.) > > Use two viewports (one for each camera), one in the back for further > geometry and the next one for closer. The nearest-viewport should have a > background that only erases the depth-buffer, not the color buffer. > (This is possible in several ways. I don't know if there is a out-of-the > box background for it. If not, one way is to go with a > PolygonBackground, use a custom material that has colormask set to all > false.) > > I don't know the optimal 'middle plane' distance but I expect it to be > in the "logarithmic average" of your desired near/far-planes. (i.e if > you want 1 and 10000 the middle would be around 100). However, some > gfx-vendors might employ magic tricks on z-buffer precision so your > milage may vary. :) > > I've never used OpenSGNav nor vrjuggler, so I don't know if that impedes > my suggestion. > > Cheers, > /Marcus > > Alan Austin wrote: > >> We have a very large scene with some parts of it in very close >> proximity. There is nothing we can do to keep them from being so close, >> it is a plan of the city of Beijing and the sizes of each block are >> proportionate to their max building height city codes. As we navigate >> away from the scene, we lose depth precision and z-fighting occurs. I >> had read online that rendering in two stages is a possible solution, the >> first being the nodes outside a certain radius, the second being those >> within it, clearing the depth buffer between. Is there a better way of >> doing this with OpenSG? Is there anything else that can be done? If >> this is the only solution, how would I go about doing it? Any help >> would be appreciated. >> >> Thanks, >> -Alan >> >> P.S. - Using a modified OpenSGNav bundled with vrjuggler >> >> >> > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys -- and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Opensg-users mailing list > Opensg-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/opensg-users > > > -- ------------------------------------------------ Alan Austin Cell 515-708-2851 Computer Science Liberal Arts and Science Beijing Project - VRAC - ISU [EMAIL PROTECTED] ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
