| The virtual reality technology is currently in the rapid development phase, various virtual reality application are upgrading quickly. In this paper, taking virtual reality as background, an analysis of research status and development trends of the virtual reality technology is made, combined with needs of driving simulation system based on virtual reality technology, the design and implementation of a new driving simulation system are proposed.Firstly, this paper analyses the principle and structure of the driving simulation system. With Unity 3D working as software platform, the three-dimensional scene is carried out and rendered. With Logitech G25 as driving simulator collecting the control data, such as steering wheel, accelerator, brake, clutch and gear, the state of motion and camera perspective are controlled. The scene is displayed both with Oculus Rift and CAVE, where head tracking system allows users to observe a 360-degree virtual scene. Leap Motion is used for hand tracking, virtual user hand will be generated in the scene and tracking data will drive the virtual hand’s movement, which lead to a direct interaction with the virtual object.According to the overall design of the system, the software of the system is presented, including 3D modeling and rendering module, vehicle driving algorithm module, the head/hand tracking module and human-machine interaction module. The process of building and rendering of the scene is explained with diagram, including texture mapping, creating terrain, generating road model, making sky box, light rendering, as well as optimizing camera control. Scripts are used to control hand tracking and realization of driving simulation algorithm. Three feedback channels, visual feedback, tactile feedback and auditory feedback, are employed in this paper after analyzing the importance of feedback in HMI.Then the three-dimensional display of the scene is achieved separately on two hardware platforms:Oculus Rift helmet display and CAVE projection display system. The principles and results of display on these two platforms are analyzed.Lastly, the paper makes a summary of the research contents and the main work of the author. The further improvement of driving simulation system based on virtual reality technology is raised according to the existing problems. |
