LOD - Level Of Detail. Obviously when you build a terrain database, you build it in few different level of details. What is close is more detailed what is further is less detailed. All of the terrain generation tools are aware of this and they build the final scene graph using LODs. They often build it as quad tree structure.
So what you would need is, different representation of the ocean that will change based on the range. And that is done with LOD node. So your ocean can be polygonal for far range, and a hole for closer range (the hole will become your osgocean) The terrain tools like TerraVista, can do this easy. When you build your database, you would have vector culture (ESRI shape. etc) for your ocean. And you specify how this culture will be represented in your final terrain database. So you make it polygonal for lower LODs and a hole for the highest LOD. Then you set the range of your osgocean to be the same as your highest LOD range That is how I build the bosphores database with TerraVista. I am not very familiar with vpb (well, I used it couple of times to generate the whole earth with the blue marble dataset). You would need to see if vpb can work with vector culture. Or go with some commercial tolls, TerraVista, TerraSim ... etc. There are some contractors as well you can outsource the terrain generation to them. Maybe you explain what is your final database (also, what kind of sources you have) and we see if we can give better guidance. I expect some of the rest from the community might have faced and resolved this issue differently then me. -Nick On Tue, Aug 31, 2010 at 12:54 PM, issam boughanmi <amigof...@gmail.com>wrote: > can you explain more in details this please ? > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=31188#31188 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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