Hi Jake, On Tue, Oct 19, 2010 at 8:13 AM, jake see <[email protected]> wrote: > Now, would OSG be categorized more as a scene management library or a > graphics rendering engine?
It's a scene graph ;-) As to what one might classify as a "scene management library" or a "graphics rendering engine" I think you might get a different answer for every engineer you might ask. Does a scene graph like the OSG overlap with both of these categories? Well both will often have a scene graph in them, but not necessarily a really scalable and powerful one as the OSG. You can certainly write pretty power applications with minimal code using the OSG, for many there is no need to add extra layers on top, but for others you might wish to do this. Where your own applications needs sit I can't say, I have pretty well no knowledge of what you are trying to achieve with your application. > Are there any preconditions for osgTerrain? i.e. size of height field? file > format? I read that I should use VTP and VirtualPlanetBuilder, even so, are > there any preconditions? Cos I cannot seem to find the right documentation. There are no limits to osgTerrain sizing save for available memory and performance constraints, but this is true for anything you want to do with the computer. VirtualPlanetBuilder builds paged databases that contain osgTerrain::TerrainTiles. With a paged database you can scale up to handling multi-terrabyte databases running at solid 60hz. If you want to do whole earth at .25 m imagery and you have enough disk space then VirtualPlanetBuilder and osgTerrain can handle building and rendering it. VTP has it's own sets of classes for doing terrain. I don't know if any of them can do paged databases or geocentric databases yet. When terrain gets disucssed on osg-users these days VTP is almost never mentioned, and we discuss terrain alot, so I suspect it's been a while since VTP was viewed as cutting edge. VPB, osgTerrain and the 3rd party osgEarth NodeKit (that leverages the OSG's paging and osgTerrain support) tend to be what most users, both hobbyist and professionals tend to use for terrain these days. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
