-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ralf Gerlich wrote: > Hi! > > Harald JOHNSEN wrote:
> >> But if the the real problem is those anoying triangle why not simply >> delete them ? Frankly we don't care about the geometry in the btg file, >> we just need a height field, let just built this grid and voila (this is >> for the display, the btg is still used for agl computation, >> intersection, etc or not because finding a height in a grid is instant, >> no more sequential scan of a soup of triangles). > > Exactly. > > The question that comes to mind is whether OpenSceneGraph does not > already have support for such a thing. The applications of OSG I have > seen seem all to use this concept so maybe it is reasonable to believe > s.th. like that has been included in OSG? Mathias? > OSG has primitive support for rendering heightfields, but it has good support for producing geocentric (even whole earth), paged databases with overlay textures and Level-Of-Detail from DEMs... the same sources that FlightGear uses. The polygons are not a grid but a TIN. So if you really want to depart from the btg format, there you go. See http://www.openscenegraph.com/projects/VirtualPlanetBuilder. I don't think this scheme is the best possible, and you'd still need to support the surface properties somehow, but it gets a lot of use from the OSG community. Tim -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGjk6deDhWHdXrDRURAqLJAJ9IUCqQ6ADdPsPsPIeKVKI59PxakACdGXbZ qFb72DUrZlT2XdWj/HjXIb0= =MkkV -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
