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
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