摘要：随着虚拟现实技术的快速发展和日益成熟,其应用也越来越广泛,并开始向各个领域延伸。目前,虚拟现实技术已经在娱乐、医疗、教育与培训、工程与建筑等方面获得了广泛应用。将虚拟现实技术应用于地铁列车驾驶仿真系统中,利用先进的计算机仿真技术对驾驶人员进行有效的训练,不仅能有效缓解目前我国列车驾驶系统面临的压力,而且可以避免环境污染,减少能源消耗,降低训练成本,因此具有十分重要的意义。视景系统是地铁列车驾驶仿真系统的重要组成部分,它是衡量一个仿真系统先进与否的关键因素之一,也是保证训练效果的重要条件。三文虚拟环境的建模是虚拟现实和视景仿真技术的基础，现已广泛地应用在各种领域中。文中介绍了目前流行的仿真建模软件及其技术特点和开发流程，对一般情况下三文虚拟环境的构成进行了研究，重点阐述了三文虚拟环境的建模方法和步骤。结合虚拟场景系统开发实例,从视景建模角度,详细分析了纹理贴图得几何尺寸和模型多边形数量,对系统运行性能的影响,并提出了利用纹理贴图、LOD和网格等建模技术提高系统运行性能的方法。在虚拟场景驱动中,实现了利用键盘、鼠标等一般输入输出设备,进行步行、鸟瞰等多种方式的漫游,增进了人机交互性能。为使系统支持立体显示,运用了Vega提供的立体显示技术。文中涉及的技术对其它虚拟场景仿真系统的开发具有重要参考价值。22937
毕业论文关键词：虚拟现实；场景仿真；三文建模
Virtual modeling and simulation subway scene
Abstract: With the rapid development of virtual reality technology and increasingly sophisticated, and its applications are more widely used, and extends to all areas. Currently, virtual reality technology has been widely used in entertainment, health care, education and training, engineering and other buildings. The virtual reality technology used in subway train driving simulation system, using advanced computer simulation technology to effectively train drivers, not only can effectively alleviate the pressures currently facing our country train driving system, and to avoid environmental pollution, reduce energy consumption, reduce training costs, and therefore has a very important significance. Visual system is an important part of the subway train driving simulation system, which is one measure of a simulation system is a key factor in whether or not advanced, and it is an important condition to ensure that the training effect.As a foundation of Virtual-Reality and Visual Simulation, 3D virtual environment is widely used in many fields recently. This paper introduces the popular software of simulation and modeling, as well as their special technology and development flow, researches and stresses on the structure of 3D virtual environment and its modeling method. With the instance of a virtual campus, from the aspect of the scene modeling, it analyzes the effect of the texture past size and the model polygon amount on the operation performance of the system, and puts forward a lot of new realization methods including texture past, LOD, mesh, and other modeling technologies in Creator, to improve the capability of the virtual scene simulation system. In virtual scene drive, it realizes many roam mode using the keyboard, mouse, and other common I/O equipments, to improve the man-machine interaction. In order to make the system support stereo display, it manages the stereo display technology of the virtual scene simulation in Vega. The technologies involved in this paper have significant reference values to the exploitation of other virtual scene simulation systems.
KeyWords: Virtual reality; Scene simulation; 3D modeling
 
目录
1 绪论    1
1.1 论文选题的目的与意义    1
1.2 地铁驾驶系统仿真简介    2 基于Multigen Creator虚拟地铁场景的建模与仿真:http://www.youerw.com/tongxin/lunwen_15799.html