| 摘要 |
PROBLEM TO BE SOLVED: To realistically render the environment of a mobile observer with a high degree of detail according to any viewpoint, and also provide navigational aids such as route guidance and reference information pertinent to displayed objects, in three-dimensional visual navigation for a mobile unit. SOLUTION: A navigation system has a location calculation unit for calculating an instantaneous position of a mobile unit, a viewpoint control unit for determining a viewing frustum from the calculated instantaneous position, a scenograph manager for communicating with a geographic database to obtain geographic object data associated with the determined viewing frustum and generating a scenograph organizing the obtained geographic object data, and a scenograph renderer for graphically rendering the scenograph in real time. COPYRIGHT: (C)2004,JPO&NCIPI |
