Hi David, If there isn't a Terrain node decorating your terrian just add one, then add your paged terrain to this.
Also w.r.t distant tiles being rendered at full res, this shouldn't be happening as VPB generates a hierarchical paged database, with PagedLOD being the central bit of glue that makes the paging work - PagedLOD "is a" LOD. My guess is that everything may well be working just fine, just your expectations are off. Also when doing benchmarking of paged database only do it in meshed mode, as modern drivers render wireframe very slowly compared to meshed ones. Wireframe is good just for double checking what the paging is doing. As a general note I'd also add the VPB by default does build pretty high res databases, you can temper this in the original build or at runtime via the LODScale and SampleRatio, personally I'd recommend the later as it allows you to trade performance for quality on hardware that can't handle the high res datasets, but on high end hardware you can let everything run at full res. Robert. On Thu, Feb 26, 2009 at 9:48 AM, David Karlsson <[email protected]> wrote: > Hi, > > The problem is that I can't find any osgTerrain:Terrain node in the file > generated by VPB. > > The following command always returns NULL: > > osgTerrain::Terrain* testNode = > findTopMostNodeOfType<osgTerrain::Terrain>(terrainNode); > > /David > > > -----Ursprungligt meddelande----- > Från: [email protected] > [mailto:[email protected]] För J.P. Delport > Skickat: den 26 februari 2009 10:20 > Till: OpenSceneGraph Users > Ämne: Re: [osg-users] How to use setSampleRatio on terrain generated with VPB? > > Hi, > > have a look at the osgmultitexturecontrol example. Search for setSampleRatio. > > jp > > David Karlsson wrote: >> Hello, >> >> I'm having problem with my terrain generated using Virtual planet builder. >> Basically, what I want to do is to control the resolution/lod-scale of the >> rendered terrain. If I simply add the node to the scene graph, the terrain >> is rendered using the most detailed lod-level very far away from the camera >> resulting in a lot of unnecessary geometry: >> >> http://www.student.itn.liu.se/~davka531/render_wireframe2.jpg >> >> I found out that I can control this by using setLODScale(...) on the camera, >> but this will unfortunately change the behaviour of all lod-nodes in the >> scene - not only the level of detail of the terrain. >> >> Instead I tried to use setSampleRatio(...) on the terrain node. The problem >> in this case is that I can't find a osgTerrain::Terrain node in the .ive >> file generated from vpb. All I got are osgTerrain::TerrainTile nodes, and I >> can't get the osgTerrain::TerrainTile::getTerrain(...) functions to return a >> valid pointer. What have I missed? Aren't TerrainTiles supposed to be >> connected to a Terrain node? >> >> Some addtional info: >> >> The command used to build the terrain: >> >> osgdem.exe --geocentric --TERRAIN --PagedLOD >> --max-visible-distance-of-top-level 200000 --layer 0 -t dir1 --layer 1 >> -t dir2 --layer 2 -t dir3 -d heightDir -l 10 -o terrain.ive >> >> OSG version: 2.8.0 >> VPB version: 0.9.9 (revision 953) >> >> Finally, I would like to say thank you to the osg community for helping me >> out with some of my previous posts. Very appreciated! >> >> /David >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. >> org >> > > -- > This message is subject to the CSIR's copyright terms and conditions, e-mail > legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. MailScanner thanks Transtec > Computers for their support. > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
