Hi, I can confirm it works well with many textures... Here's screenshot of some terrain build with 2 textures: http://perso.imerir.com/bourdin/wiki/doku.php/en/projet/massane
The only problem I have is with Shapefile, but I'm using osggis for that... If you know how to use them with osgdem ? I'm interested... For the --terrain option, it works also very well, but I have to disable GL_ARB extension with my ATI otherwise it crashes. Pierre Le vendredi 15 mai 2009 à 09:08 +0200, J.P. Delport a écrit : > Hi, > > Mao wrote: > > Hi! Recently, our project is planning to migrate from mini to VPB. > > However, we encounter with several questions. > > > > > > > > 1. In the example of osgDEM, I infer that osgDEM processes tiff > > format only. But tiff uses 32-bit offset which limits its size to 4G > > bytes. Most of our data are ERDAS img file or rrd file, which are huge > > in size. Yesterday, we processed an img file of size 20G bytes, and > > gdal_translate it to a 21G bytes tiff. That confused me. How can VPB > > handle extra bytes? > > osgdem/virtualplanetbuilder can read all files that gdal can read, so > have a look here: > http://www.gdal.org/formats_list.html > > You can use the gdal tools to split your large data into multiple > smaller geotiffs <2GB if you want. > > > > > 2. Another thing is that, texture files we got sometimes are in > > pieces, and we should use gdal_merge.py to merge them into one big tiff. > > According to the source code, VPB can handle only one texture file. Can > > we use multiple texture files? > > It is better in pieces :) Smaller files, easier to handle. VPB can > handle multiple texture files, you can even pass a directory name and it > would use all the files in the directory. > > See here too: > http://www.openscenegraph.org/projects/VirtualPlanetBuilder/wiki/ExampleClusterJPD > > > > > 3. The last question is when applied with “--Terrain” or > > “—HEIGHT_FIELD” options, there is no texture at all. Can we encapsulate > > both texture and DEM data into one output file? And it seems that > > osg::HeightField does not provide height = getHieghtAt(terrain.x, > > terrain.y) method. > > Hi, --terrain works for me. You can have DEM layer + multiple texture > layers. I can't answer about height_field. > > jp > > > > > > > > > Thank you very much for listening! > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Pierre BOURDIN I.M.E.R.I.R. Av. Pascot BP 90443 66004 PERPIGNAN tél: 04 68 56 84 95 fax: 04 68 55 03 86 email: [email protected] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
