HOT

osg::Vec3d getHOT(const osg::Vec3d& position, osgViewer::CompositeViewer& viewer, osg::Vec3& normal)
{
    osg::Vec3d result;

    osg::Vec3d s = position + osg::Vec3d(0, 0, 1000);
    osg::Vec3d e = position - osg::Vec3d(0, 0, 1000);

    if (viewer.getView(0)->getSceneData())
    {
        const osgSim::LineOfSight::Intersections& intersections = osgSim::LineOfSight::computeIntersections(viewer.getView(0)->getSceneData(), s, e);
        osgSim::LineOfSight::Intersections::const_iterator itr = intersections.begin();
        for (; itr != intersections.end(); ++itr)
        {
            result = *itr;
            std::cout << "Intersection: " << result << std::endl;
        }
    }

    return result;
}