hi i would like to get a better understanding of osg's various possibilities in terrain-visualization. currently i'm using osggis/virtualplanetbuilder to display georeferenced, common gis rasterfiles which work wonderful. but as an osg-newbie i also would like to know what are the approaches of basic terrain handling of osggis' underlying osg.
what i know/suppose so far: * according to the "osgforest" example, the most basic method seems to be using osg::Geometry, attach a vertex-/texturecoord array and draw as indiced DrawElement primitiveset. * the other possibility seems to be osg:HeightField, which is less code than the above one, as well i can omit texturecoordinates (at least according to the example) because of its regular grid characteristic. what i would like to know: * are these assumptions right? * are there other terrain related possibilities? * i also have read about osgTerrain, but when i start the osgterrain example with an osgdem (--TERRAIN) generated dataset: "osgterrain.exe boston-sample\terrain\out.ive" i get the following message: "No model created, please specify terrain or master file on command line", so till yet i haven't got an impression what osgTerrain actually is/does. actually it is more important for me to get some information about osgTerrain itself, than to get this example running - but if it happens that someone knows why that application doesn't work it's okay too ;-) * is there an easy way or example on how to load terrain vertices from a dumb raster file (heightmap, like you use in many 3d modelling programs) directly to osg (without osgdem preparation)? thanks in advance, christian ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=7253#7253 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
