三维虚拟漫游中相关技术的研究

发布时间：2018-06-17 06:53

本文选题：虚拟现实 + 三维地理信息系统　；参考：《江苏大学》2008年硕士论文

【摘要】： 虚拟现实技术能够利用计算机生成较为真实的模拟环境,使用户沉浸在虚拟环境中,同时通过人机接口,实现用户与虚拟环境直接交互。三维虚拟漫游是虚拟现实领域的一个重要的研究方向,其在沉浸感、交互性与实时性综合效果方面的优势是传统平面效果图与动画技术所无法比拟的。目前,虚拟现实技术作为信息科学的一门新兴学科,以其特有的优势被广泛地运用于军事、娱乐、制造、医学、地理信息系统等各领域。本文首先简要介绍了三维虚拟漫游的基本概念、基本内容及关键技术。然后讨论了国内外虚拟现实技术的研究状况,对现有的三维模型数据文件的结构进行了分析比较。探讨了三维虚拟漫游系统中模型的数据获取和组织,在研究3DS模型的数据结构的基础上,设计了读取3DS文件中不同类型数据的函数,并实现了3DS模型的绘制;研究了大规模地形地貌的生成和渲染算法,在场景渲染时,采用对大规模地形数据分割,同时对地形和内存分别进行分块处理的方法来实现虚拟现实中大规模地图的渲染,并利用井地算法实现大规模地形实时渲染时的场景切换;在三维虚拟场景中,运用钢丝算法实现自动漫游路径的生成。本文的最后还提出了一种动态投放虚拟广告的解决方案,可以在三维虚拟漫游的场景中实时、动态地植入各种类型的虚拟广告。本文采用Visual C++与三维图形开发工具Direct3D,开发了一个图形引擎,可以方便地读取3DS模型数据文件的信息,对虚拟现实进行模拟、渲染。在此图形引擎的基础上,开发了一个三维虚拟漫游演示系统。文章最后对全文的内容进行了总结,提出了进一步需要完善的方面,并讨论了今后继续研究的方向。
[Abstract]:Virtual reality technology can make use of computer to create a more real simulation environment, make users immerse in virtual environment, and realize the direct interaction between user and virtual environment through man-machine interface at the same time. 3D virtual roaming is an important research direction in the field of virtual reality, and its advantages in immersion, interactivity and real-time performance are unparalleled by traditional plane effect graph and animation technology. At present, as a new subject of information science, virtual reality technology has been widely used in military, entertainment, manufacturing, medicine, geographic information system and other fields with its unique advantages. In this paper, the basic concept, basic content and key technology of 3D virtual roaming are introduced briefly. Then, the research status of virtual reality technology at home and abroad is discussed, and the structure of existing 3D model data file is analyzed and compared. This paper discusses the data acquisition and organization of the model in the 3D virtual roaming system. On the basis of studying the data structure of the 3DS model, the functions of reading different types of data from the 3DS file are designed, and the 3DS model is drawn. The generation and rendering algorithm of large-scale terrain and geomorphology are studied. In scene rendering, the large-scale terrain data is partitioned, and the terrain and memory are divided into blocks to realize the rendering of large-scale map in virtual reality. In the 3D virtual scene, the steel wire algorithm is used to generate the automatic roaming path. At the end of this paper, a solution of dynamic virtual advertising is proposed, which can be used to embed all kinds of virtual advertisements in the scene of 3D virtual roaming in real time. In this paper, a graphics engine is developed with Visual C and Direct3D. it can easily read the information of 3DS model data file, simulate and render virtual reality. Based on the graphics engine, a three-dimensional virtual roaming demonstration system is developed. At the end of the paper, the contents of the paper are summarized, and the further improvement is put forward, and the direction of further research is discussed.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TP391.9

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