面向路径点导航的三维虚拟城市系统设计

s the real urban environment is very complex and uncontrollable, this paper developed a three-dimensional virtual city system based on VC-OpenGL. In order to assist pedestrians to navigate in unknown places, this simu-lation system would provide them with real-time spatial navigation information. The city model of 3ds format is exported from Google SketchUp, mapped again in 3ds Max, and displayed in the OpenGL program frame. The user roams in the virtual urban scenario in the first person, and receives the dynamic spatial information from the simulation system, which makes him follow the predefined route from the origin to the destination. This system still provides the user with the fixed-point bird's view and the roaming timer, and can save and display the user's roaming routes. Experimental results indicate that, with the aid of different types of spatial navigation information, the user can navigate to the destination successfully in a strange urban environment.