Research On Scene Management And Path Planning Of Virtual Roaming System

The development of Virtual reality provide an effective way that people understand the world and give the rein to their imagination.Virtual scene mangement and intelligent roaming play an important part among various reasearch in the field of virtual reality.Through the virtual scene, architect can verify the feasibility and rationality of the design beforehand. In addition,people can browse the vitual building before they visit the real buiding in order to avoid searching the destination everywhere blindly.In this paper,we first analyze the character of VR,and provide two mainly tasks:building of virtual scene and path planning.we summerize some important scene modeling technology, including polygon modeling,model importing,image protracting, hybrid modeling. And the lastway is this paper use.second, based on there scene mangement research,we provide quadtree to manage the Three-dimensional enviroment and improve protracting efficiency.Besides,we study the path planning problem. Through Mathematical Analyzing and abstract modeling,we use some method to improve the A* algorithm based on graph searching which can find the shortest path of the three-dimensional model.This paper develops a Virtual Library based on VRML and JAVA.The system ues three layer architecture design. In the process of virtual scene modeling,this paper presents the modeling process in the virtual construction of a variety of modeling methods and techniques to combine the application of methods, effectively improve the quality and efficiency of the modeling.Through combining several modeling technology,the quality and efficiency of virtual building is improved obvious.Meanwhile, this paper simplify three-dimensional scene into two-dimensional plane, and based on an improved A* algorithm,implement path planning to improve the efficiency of the path search and success rate.