Hi, I use osgdem to create an IVE model with mercator projection and can load the model in my OSG program. I want to realize such funciton: (1) input the WGS84 coordinate (lon, lat) of target point (2) calculate the elevation (z) of the point from the terrain file (3) draw a graphic object at the point (lon, lat, z) The problem is how to convert the WGS84 coordinate of inputted point to mercator projection which is used in my OSG program.
I have used the folllowing method: Code: osg::ref_ptr<osg::CoordinateSystemNode> csn=new osg::CoordinateSystemNode; csn->setEllipsoidModel(new osg::EllipsoidModel); csn->addChild(terrain);//"terrain" is IVE model with mercator projection double o,p,q; csn->getEllipsoidModel()->convertLatLongHeightToXYZ(osg::DegreesToRadians(80.0),osg::DegreesToRadians(115.0),osg::DegreesToRadians(0.0),o,p,q); The convert value (o,p,q) is not correct. How can I realize the function? Thank you! Cheers, tianyun[/code] ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53776#53776 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
