Hi David, In VPB SVN archive support is temporarily disabled, I do plan to re-enable it this month. BTW, what platform are you using? I haven't seen a performance delta between archive and non archived forms - I work under Linux.
FYI, In OSG-2.4 and VPB SVN there is support for build with --terrain in osgdem, that build an osgTerrain::TerrainTile database, these tiles are basically regular grids, that osgTerrain can render how it wants. There a couple of advantages in using --terrain: 1) osgdem --terrain databases are much faster to build as no simplification is done beyond that introduced by sampling the source data, so you'll end up with more triangles, but modern hardware is faster so this less of an issue. 2) osgdem --terrain option also builds more compact databases, which will get even more compact once I introduce height field compression/decompression into .ive. 3) Finally if you place an osgTerrain::Terrain object above a paged database that contains TerrainTiles you can control the sample resolution that the TerrainTechnique that does the rendering of TerrainTiles uses when set up its geometry to render. This allows you to balance the load for different hardware, so a 8800+ series could cope with full resolution, and low end card you sample to half or quarter the density. Robert. On Wed, May 14, 2008 at 10:29 AM, David _ <[EMAIL PROTECTED]> wrote: > Hi > > we´re using osgdem to generate islands in our project and we´re considering > moving to OSG 2.4. We´re currently in 2.2 > > the last osgdem in SVN generates the island meshes with some kind of > optimization so the meshes are not so high density but still have high res > textures > > we´re really interested in having high resolution textures with light > density meshes so this optimization is really good for us, > > the problem is that the -a option is currently disabled in the last SVN VPB > and we´ve noticed some performance drop in loading time if the ive´s are not > all together in one osga file (our islands are more than 1GB each, so this > is important) > > A) which is the last VPB release having this mesh optimization and the -a > option?? it must work with OSG 2.4 too > > B) also, is it possible to tell osgdem to limit the triangle number but not > the texture detail??? > > We have a lot of things to do right now, and generating all the islands > again is something that can wait at the moment. So if you´re planning to > update the VPB any time soon, please tell me and i´ll wait for the -a option > to be back again, otherwise, please answer the A) question > > we´ve got some nice screenshots of the islands rendered by OSG 2.2, i´ll ask > my boss this evening if i can make them public, so you all can take a look > if you find it interesting > > cheers > > sorry for my english > > > > ________________________________ > Sigue los principales acontecimientos deportivos en directo. MSN Motor > _______________________________________________ > 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
