一个完整的osgearth程序，飞机在空中飞行，并用线条标出飞机移动的轨迹，效果见1.jpg.osgearth需要事先完成安装配置等工作-A complete osgearth procedures, aircraft flying in the air, and marked with lines of track aircraft movement, the effect see 1.jpg.osgearth requires prior completion of the installa