Aurelien, I don't have specific answers to your questions but have you considered using osgEarth instead of VPB?
Given what you're trying to accomplish, osgEarth may be a better fit... -Shayne -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Aurelien Albert Sent: Wednesday, March 14, 2012 9:47 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] [vpb] Multiple terrain layers and relative altitudeheightmap Hi, I'm starting a new project that will use VPB databases, but I have some questions about data manipulation : (all data are re-projected to the same coordinate system before any processing) 1. I need to manage multiple "terrain layers". A layer is made of elevation data and texture data. So I think to build a terrain database for each "terrain layer" and then add all these database in the same scene graph. This allow the user to rebuild / show / hide only selected "terrain layers" Is there any technical / performance problems to use multiple terrain database nodes in the same scene graph ? I know there will be some rendering artifacts because a (X;Y) point can have different altitudes (one from each "terrain layer") but this is not my question, I wondering about TileID management for example. 2. Some "terrain layers" have elevation data relative to another one. Is there anyway to manage that using osgTerrain ? I think I can "add" the 2 elevation data using GDAL before database creation, but I would prefer to do that at runtime. 3. Is there any "invalid elevation value" management to "cut holes" in source elevation data and then build a database with holes inside ? (not simple shape holes as square) 4. Is there any way to build a "texture only database" (no elevation data) and then add / remove it (as a colorlayer on pre-loaded terrain database) at runtime ? Thank you! Cheers, Aurelien ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46268#46268 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
