Hi Kiff, I not familiar with the local tile origin support in TXP, so you best bet is go talk to Terrex engineers about this feature.
FYI, The VirualPlanetBuilder generates tiles all with a local origin and a MatrixTransfrom above each tile to place in to the 3D world. The OSG's internal matrices default to double matrices, and the camera setup up code all uses doubles so precision is maintained all the way till the data is passed to OpenGL, so VPB generated database work just fine with whole earth databases right down to ground level. So on the OSG side everything is up to the task, its just a matter of getting things on the TXP plugin side to set things up in a similar way. Robert. On Fri, Mar 7, 2008 at 2:49 AM, Kiff Loh <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > > I'm building a large visual database using Terra Page and running on OSG. I > read that from Terra Vista help that Terra Vista allows the TXP database to > have an origin for each tile instead of the whole gaming area. It states > that "This setting requires an extra offset for the runtime." > > > > Anyone knows how do we load such a database in OSG? I may need such a DB > because my current XYZ is causing a lot of jittering from terrain to models > and lights. > > > > Below is an extract from Terra Vista Help. > > > > "Use this field to tell Terra Vista whether the coordinates in your output > TXP database are offset with respect to the origin of the Gaming Area, or > with respect to each tile. This could, for example, help if your coordinates > were getting too large. Your choices here are: > > > > Origin. When set to Origin each tile will be relative to the origin of the > database. This is the default setting. > > > > Tile. If set to Tile, each TerraPage tile will be relative to its own > origin. This setting requires an extra offset for the runtime. The advantage > of using Tile, is that there is more numerical accuracy for larger > databases. " > > > > > > Kiff > > > > -----Original Message----- > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
