Hi Leandro, On 1 June 2015 at 13:04, Leandro Linardos <[email protected]> wrote: > Yes, definitely 1024x1024 is a huge tile size. I'm working with a CDB (Common > Database) database, and the tile size is 1024x1024 by definition. > > Subsampling (using sampleRatio > in osgTerrain::Terrain) improve the performance. > > Once merged, the LOD switch in the PagedLOD it's ok, no freezing. Some hints > or ideas to fix the merging freeze keeping the tile size?
The 1024x1024 is the problem, while it might be what the database format you have uses, it's not appropriate for real-time work. One workaround would be to generate multiple TerrainTile tiles for each CDB tile. Another approach would be to try the DisplacementMappingTechnique in OSG svn/trunk and recent dev releases. This technique downloads the tile elevations as a texture and then uses shaders to place a shader base geometry to the correct elevations. This shared geometry is created once per LOD level and once per Latitude for geocentric databases. The memory footprint with DisplacementMappingTechnique is substantially lower. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
