Research On Virtual Roaming System Of Experimental Center Based On Vega Prime

To conduct muliti-sited collaborative virtual design with the network bandwidth limit, this paper develops a Web-based 3D model database management system in a virtual environment, which achieves uniform management of 3D model data and can support multi-sited collaborative simulation. By designing Java-based drivers for Spaceball 5000, an interactive virtual environment is constructed and users can perform manipulations such as six-freedom rotation, zoom and romotion on the models in the virtual scene via Spaceball 5000 mouse.The main work in this paper can be concluded as follows:1) A Browser/Server-based virtual reality system is developed using Java/Java3D to meet the need of multi-sited collaboration by embedding the relevant Applets into web pages.2) Spaceball 5000 is connected to a virtual environment. Users can control the position and gesture of models in the virtual scene via six-freedom space balls and 12 programable keys of Spaceball 5000.3) An assembly simulation system of the piston pump is achieved with the assembly order and motion track predefined manually. Users can display or obscure the assembly path and modify the appearance of the model and the background picture of the scene.4) A model database management system is built. The 3D models can be navigated, searched, added, modified and deleted whilst the information of users is manageable.In a word, the web-based 3D model database management system can not only provide friendly human-machine interface, but can supply effective management methods for multi-sited model resource, making it possible for users to share and reuse the resource to the most extent through the open network platform. By employing virtual reality techonoly and combining model database with virtual environment, users can further perform virtual assembly and simulation of the model and even multi-sited virtual design in the future. This paper is a preliminary attempt aiming at this.