The Design And Implementation Of Three-dimensional Building Roaming System

In recent years,with the rapid development of Virtual Reality technology,more and more attention are focused on numeralization and three-dimension visualization of scene. The research and application of virtual technology have become a hot research area. With the development of Internet, the research area must have broad practical value and bright application prospects. This dissertation first introduces the related technologies in virtual reality, focuses on the 3D modeling mechanism and human-computer interaction function in virtual scene, and finally implements a virtual online 3D architecture which is based on desktop system.To design and implement the three-dimensional roaming system based on Jinan hero Mountain market, according to software engineering theory,several steps are designed to implement three-dimensional roaming system. First, system requirement is analyzed and system function is designed,3Dsmax and VRML combined together to implement the system modules. Second, in the modeling stage, according to the unification of modeling vividly and real-time interactive enegy, hybrid modeling approach are used to implements 3D modeling on this system, the overall system model's mechanism and performances optimization are presented, all of this reduce the sence data quantity and enhanced real-time interactive. In the interaction stage, the method that combine VRML and JAVA language are used as the main way to implement the real-time acquisition of coordinate in virtual scene and the interactive function of 2D map and 3D scene. And new node type is established by expanding VRML prototype, this implements large-scale scene dynamically and duplicate model in virtual scene.At the end of this dissertation, The system development processes are summrised and a brief outlook is made in the future work.