Hi Ümit as I said OpenFlight(tm) in itself does not inherently support PagedLOD's, the format only directly supports LOD's That does not mean a PagedLOD system such as OSG or Train cannot use an OpenFlight(tm) file directly for a geometry leaf, OSG and VPB by default use IVE and OSG/IVE have direct support in them for PagedLODing With OpenFlight(tm) The pagedLODing/loading has to be handled by the Scenegraph and or Application and not by OpenFlight(tm) ( this is how Vega and Vega Prime work/ed ) Apart from OpenFlight(tm) not directly supporting PagedLOD's you typically don't want to use OpenFlight(tm) directly because of the load time, in the case of VegaPrime most users would convert the OpenFlight(tm) to VSB which would typically load between a factor 10 to 100 times faster, and thats why OSG has IVE files they load in a similar very fast time to VSB files as compared to OpenFlight(tm) files which load slowly due to the inhernat 3d model content
Gordon __________________________________________________________ Gordon Tomlinson Email : gtomlinson @ overwatch.textron.com ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ümit Uzun Sent: Monday, August 18, 2008 3:41 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Virtual Terrain Generation on Which Tool ? Hi Jean, Robert and Gordon, I have examine the Trian3D tool which is using pagedLOD virtual terrain in OpenFlight and OSG. And I see that in example database, I think they use Jean's suggested method in creation of terrain. They save the terrain in separeted database in PagedLod and the other part of city models are created in other part of database format for every part of PagedLod database tile. Then they collect the related terrain database and models database, so they show you whole cith of terrain :) If I understood wrong in this method, please look at the (http://www.triangraphics.de/index.php?1=Download&l=eng) simple database in flt and osg and show me the right way. And I think Jean has a amazing instinct on this topic :) Thanks so much everyone. Ümit Uzun 2008/8/18 Jean-Sébastien Guay <[EMAIL PROTECTED]> Hi Gordon, Robert, Umit, FYI OpenFlight(tm) does not directly support PagedLOD OK, that's what I thought. So my suggestion to convert to both a Blender-readable format *and* .ive (with PagedLODs), use the former to add features to the terrain, then save only the added features and load them in the final app with the .ive PagedLOD terrain would make sense. Thanks for confirming what I instinctively thought. :-) J-S -- ______________________________________________________ Jean-Sebastien Guay [EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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