Hello, I have read in an ive terrain database created with the following command:
osgdem --geocentric -d dted.geotiff --POLYGONAL --no-terrain-simplification -o terrain.osg What I want to do is find the lat lon of a given vertex within the coordinateSystemNode. I am able to read in the ive as a node and do a dynamic cast to a coordinateSystemNode. I also have a nodevisitor set up that is able to pull out the vertex values that I need. However, these vertex Vec3d values are in the local coordinate system of the node, not the world coordinates. I know by looking at the terrain.osg file that the structure of the coordinateSystemNode is as follows: CoordinateSystemNode - EllipsoidModel - MatrixTransform -- Matrix -- Geode --- Geometry ---- ClusterCullingCallback ---- PrimitiveSets 2 ---- VertexArray ---- NormalArray ---- ColorBinding OVERALL ---- ColorArray ---- TexCoordArray I think I may have to somehow use the Matrix in the CoordinateSystemNode to get out the global xyz values from the vertex coordinates, then convert the global coordinates to lat lon using osg::EllipsoidModel::convertXYZToLatLongHeight Is this the correct method? Am I missing something that would make this process easier/more efficient? Thanks much. -Ethan P.S. Sorry for all the questions lately, not trying to spam the forum too hard, I try to spend at least a few hours trying to figure anything out on my own before posting here. ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=43944#43944 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
