On Wed, Mar 14, 2012 at 9:46 AM, Aurelien Albert < aurelien.alb...@alyotech.fr> wrote:
> 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. > I've done it before without problems. > 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. > Not really. You should consider looking into osgEarth. It might have a way to do this since it builds the terrain on the fly. > 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) > I don't remember how VPB handles this anymore. I know I've done it though. > 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 ? > This is something osgEarth is MUCH better suited to doing. > > > 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.org > -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Training • Consulting • Contracting 3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL Digital Imaging • GIS • GPS • Telemetry • Cryptography • Digital Audio • LIDAR • Kinect • Embedded • Mobile • iPhone/iPad/iOS • Android
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