Hi All, Last night I uploaded a 547Mb paged database to openscenegraph.org. The .ive files are all generated using zlib compression that is built into the svn/trunk version of the OSG, you won't be able to load them with any prior version of the OSG I'm afraid as the compression support has just been introduced. To view the database you can use:
osgviewer http://www.openscenegraph.org/data/earth_bayarea/earth.ive The database I generated with the svn/trunk version of VirtualPlanetBuilder, using options to generate the compressed data, to use non power of two textures for the highest res tiles, and disabled mipmapping. These options all work to minimize the tile sizes which in turn means that the data is better suited for streaming over http. The data itself is composed of the Nasa blue marble 1km data, with high res insert in the bay area of california. You should be able to find the Don Burn's local hang gliding hill that the osghangglide example is based on, which in turn was the original inspiration for the whole OpenSceneGraph odyssey. To help find this little insert I've uploaded an animation path: http://www.openscenegraph.org/data/earth_bayarea/bay.path Grab this then run osgviewer with the path: osgviewer http://www.openscenegraph.org/data/earth_bayarea/earth.ive -p bay.path This will set up an AnimationPathManipulator that zooms you into the high res insert, and then around the globe. Pressing '4' will take you to the TerrainManipulator so you can then start exploring manually, pressing '5' will take you back to the animation path. The next little thing your can try is to populate a local file cache, so the next time you load up the data you can pick up on locally cache files rather than hitting the server. osgviewer http://www.openscenegraph.org/data/earth_bayarea/earth.ive --file-cache MyFileCache Or via an env var: export OSG_FILE_CACHE = /home/me/Data/MyFileCache # change to setenv or set for your system... osgviewer http://www.openscenegraph.org/data/earth_bayarea/earth.ive Now this dataset is really a tiny one compared to what VirtualPlanetBuilder is capable of building, one I routinely test against is 20,000 times bigger, alas the data isn't public so you'll just have to find your own data and build your databases for such a Terrabyte database. All the tools are there for you, you just need to add the data. In terms of runtime need to view the bigger datasets there are no differences, osgviewer works for all of them equally. Have fun. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
