Hi David, Take a look at VirtualPlanetBuilder it may be just fine for your needs. http://www.openscenegraph.org/projects/VirtualPlanetBuilder
Regards. On Tue, Jan 13, 2009 at 2:14 PM, David Karlsson <david.karls...@foi.se>wrote: > Hi, > > I need to visualize a large terrain in real-time using open scene graph. I > have been thinking a bit about how to implement it, but I would really > appreciate any feedback or ideas on this approach. > > First some info about the data: > > - Height: The height data consists of around 1000 tiles in raster format. > Each tile is representing an area of 50x50 km using 501x501 samples. > - Terrain classification: Each tile also has an additional classification > map that needs to be loaded and will be used as a texture (1000x1000 > samples). > > What I have come up with so far goes something like this: > > - Create a class that dynamically loads/unloads the data for specific > tiles, based on the location of the viewer, using some kind of paged image > loader > - Subdivide each tile using some LOD algorithm. Then draw the geometry with > the height map and classification map assigned as textures. Finally, offset > the geometry by the value in the height map using a vertex shader. > > Can I handle this kind of data in osg in some simpler way? I don't have a > lot of experience of osg and don't really know what's implemented and what > limitations there are. I think the approach described above would work > pretty nice, but maybe I'm going to do a lot of redundant work that is > already implemented? > > Thanks, > David > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Christophe Loustaunau.
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