Research On Collision Processing Technology In Virtual Campus

The Collision Processing Technology of the virtual scenes is a challenging problem in the areas of computer animation, robot programming, computer games, virtual reality simulation and so on. The basic task of the collision processing technology is to determine whether the two or more objects collide with each other or not. And if the collision occurs, what collision reactions should be taken in the virtual three-dimensional space. Currently, there are a large number of domestic and international, practical and valuable results. But with the applications of virtual reality extension, the level's raising in the computer hardware and software and the improvement of people's requirements in authenticity and real-time interaction, the issue that how to effectively improve the speed of collision processing in order to maintain real-time interactive and authenticity in virtual scene is also increasingly prominent. The collision processing has been a hot topic once again.This paper does a comprehensive understanding and t in-depth analysis to the several of classical collision processing algorithms. According to the models in the Zhengzhou University Virtual Campus, the paper mainly does the following works.The paper introduces the process of the traditional collision processing including collision detection stage, determination the collision zone stage and the response of collision. The paper introduces the basic principles about collision detection technology and the classical categories for collision detection algorithm. It also describes the categories about time domain-based collision detection algorithms and collision detection algorithms based on space domain and their respective advantages and disadvantages.The paper studies the theory of OpenSceneGraph and the rendering process of OSG rendering engine, compares the characteristics of ive format file and osg format file, and implements the model preprocessing based on the hierarchical tree in the osg scene.The paper analyzes the collision detection problems in the current large scene and the key technology commonly used. Then the paper analyzes the basic principle of the spatial decomposition method and the bounding box. The paper also achieves the separation between the collision view and the roaming view.According to the characteristics of the model based on Zhengzhou University Virtual Campus, the paper increases the effectiveness of the collision detection in the traditional collision processing to improve the authenticity when roams in Zhengzhou University Virtual Campus. In the stage of the effectiveness of the collision detection, the paper proposes and implements transparent entity recognition and removing invalid collision on surface model established by texture mapping on the plane to improve the immersion of real-time interaction in the virtual scene.The paper implements the combination between sound engine and the engine of open scene rendering to provide participants with sound information and enrich the collision response.