SYTEM AND METHOD FOR 3D GRAPHIC ACCELERATION IN SYNTHESIS CDMA ENVIRONMENT

摘要

A system providing three-dimensional visual navigation for a mobile unit includes a location calculation unit for calculating an instantaneous position of the mobile unit, a viewpoint control unit for determining a viewing frustum from the instantaneous position, a 3D object manager in communication with at least one geo-database to obtain geographic object data associated with the viewing frustum and generating a 3D object organizing the geographic object data, and a 3D object renderer which graphically renders the 3D object in real time. To enhance depiction, a method for blending images of different resolutions in the 3D object reduces abrupt changes as the mobile unit moves relative to the depicted geographic objects. Data structures for storage and run-time access of information regarding the geographic object data permit on-demand loading of the data based on the viewing frustum and allow the navigational system to dynamically load, on-demand, only those objects that are visible to the user.