Study On Crossroads Virtual Reality Model And Visual Data Generation

With the development of visual reality technology, application fields of virtual reality technology extend from few fields, such as movie and entertainment, aviation and space, and war industry to more fields. Driving simulator is a new field. The research of applications of visual reality technology on Driving simulator has been several years at Traffic Synthesis Laboratory of Kunming University of Science and Technology. And the vehicle simulation system oriented on virtual reality had been developed successfully.The original driving simulator was assembled by integrating the various subsystems, such as vehicle dynamics, traffic management and scenario generation tool. On the one hand. Creating virtual scene of complicated traffic facility (for example crossroads) by using OpenGL has become very difficult. The research and application of driving simulator has been furthered and extended and the virtual scene models come to more complex. On the other hand, crossroads take great part in city traffic and there are a large number of crossroads in city. Additionally, generating virtual scene of city traffic need using a great deal of visual data of crossroads basing on virtual reality. Taken into consideration those factors, it is necessary to develop one system to generate visual data of crossroads oriented on virtual reality.The article studies how to create 3-dimensional model of crossroads in virtual environment and discusses mathematics model of horizontal alignment, the paper explains crossroads data visualization and defines data structures of visual data. Using TrafficSimulation can demonstrate visual data of crossroads and expert can evaluate the crossroad form the demo program.Interactive design is very important in development of crossroads design, so someinteractive technology has been discussed in detail. The paper expounds the algorithms of generating quadratic curve. Using quadratic curve and cubic Bezier curve enforces the smooth of curves.The ProBridge is developed by the method of crossroads virtual reality model and 3D data.visualization The design flow and all kinds of functions of ProBridge are illuminated in the dissertation. Giving an example of modeling one Kunming crossroads show instruction manual of ProBridge.In the last part, the paper sums up the fruits of the study and several key researches in future are put forward.