3D虛擬博物館系統(tǒng)的研究與實現(xiàn)
[Abstract]:Virtual reality technology is a simulation system that uses computer to create realistic scene and enable users to experience virtual world. It makes use of computer to create a simulation environment and makes people's hearing and vision be perceived through some technical support. It's an immersive experience. Virtual museum has attracted more and more researchers' attention and become one of the research hotspots in the field of virtual reality because it can span regional restrictions, record and preserve cultural relics well, and interact with users to display and introduce cultural relics. In this paper, the research status and related technologies of virtual museum are described, and then the problems of low efficiency of collision detection and high rendering pressure of large scene in the existing 3D scene development technology of WebGL are analyzed. This paper studies three key technologies and implements a 3D virtual museum system based on WebGL, which enables users to roam the scene smoothly and interact with each other. The main work of this paper is as follows: (1) A scenario construction method based on XML is presented. This method divides the system scene into two kinds of nodes: one is the layout node which contains the link information, the model node and the identification information, the other is the model node which contains the information of model location, material, attribute and so on. When constructing virtual scene for resource server, according to the rules of scene construction based on XML, the configuration file is formed, and the browser renders the scene according to the content of XML and interacts with the server. The practical application results show that the method reduces the rendering pressure of the scene and increases the interaction. (2) A collision detection method based on WebGL is proposed. In this method, the XML tree structure is used to determine the collision area, and the static model in the collision region is described by AABB bounding box. When the object is moving, collision detection and motion control will be realized according to two different motion modes: mouse and keyboard. The practical application results show that this method can quickly detect continuous collisions in the scene. (3) A virtual museum data transmission technology is proposed. According to the characteristics of virtual museum data transmission, this technology can be divided into static data stored by server and dynamic data generated by interaction. When the system is running, different data transmission methods are adopted according to different types of data transmission, that is, for static data, data transmission mode based on HTTP, and data transmission mode based on WebSocket for dynamic data. The practical application results show that the technology improves the data transmission efficiency and real-time of virtual scene. (4) based on the research of the above technology, this paper designs and implements a 3D virtual museum system based on WebGL. Virtual scene display, first person roaming and scene interaction are implemented on the client side of the system, while scene management, user management, data backup and other functions are implemented on the server side, combined with cache mechanism and distributed deployment. Ensure the efficient operation and real-time interaction of the 3 D virtual museum system.
【學(xué)位授予單位】:江蘇大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TP391.9;G260.7;TP311.52
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