As our application will also have to do physical simulations based on this height field data, I do not want to use external tools to do the conversion into an OSG model
here's a minimal example for the HeightField / ShapeDrawable method http://snipplr.com/view/30974/osg-height-field-example/ here's a minimal example for the Delauney method (minus the loading of the image and texture) https://github.com/xarray/osgRecipes/blob/master/cookbook/chapter10/ch10_01/delaunay.cpp I guess I will just try both methods. The only missing piece seems to be a loading function or plug-in for height field Files in ".asc" format. But the format is trivially simple. 2015-05-21 9:26 GMT+02:00 Sebastian Messerschmidt < [email protected]>: > Hi Christian, > > Have you checked if osgdem supports it? I think it will happily convert > anything into osgTerrain which can be interpreted as height data by gdal ... > > Hi, > > I am currently wondering which is the better way to go from a simple > digital elevation model (ESRI ASCII Grid format) to a geometry. The model > has a very limited area and resolution. > > These are the two methods I find feasible with stock OSG features: > > Either I could feed all the 3D points on the grid into the > osgUtil::DelaunayTriangulator. However I noticed this class generates > normals that require a BIND_PER_PRIMITIVE - possibly causing a fallback to > the slow rendering path. > > Alternatively I could put the data into an osg::HeightField and use a > ShapeDrawable to display it. > > Which of the two methods is perferable from a performance standpoint? > What I would like to get is a bit of a simplification of the geometry, > where larger triangles are used in areas with less surface features. Which > of the two methods can provide this? > > I do not want to use osgEarth, as it is a bit too big in scope for my > purpose and it has a lot of extra dependencies. > > Christian > > > > _______________________________________________ > osg-users mailing > [email protected]http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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