【作者】 李琳；

【导师】 何玉林；

【作者基本信息】 重庆大学 ， 机械制造及其自动化， 2002， 硕士

【摘要】 近年来，虚拟现实技术是十分活跃的研究领域。虚拟环境是虚拟现实系统重要的不可或缺的组成部分，它具有交互性、沉浸感和想象这三个重要特征，以一种全新的人机交互方式使人们可以直接进入计算机所创建的虚拟现实世界中，去控制事件的产生与发展。它给人们提供了一个多维信息空间，能给人们带来身临其境的感受。虚拟环境模型的成功建立无疑是实现虚拟现实系统的关键所在。在家具设计过程中建立虚拟环境模型是非常有必要的，虚拟环境将室内环境与家具设计相结合，给用户提供了一个真实的、生动的、可交互的家具展示空间，给家具设计人员提供了一个设计制作的真实场景。本论文以光明集团与重庆大学合作开发的FCADS中虚拟现实子系统为课题的研究背景，主要做了以下几方面的研究工作：* 结合现代家具业的特点与发展趋势，对虚拟环境在家具制造业中的需求作了系统详细的分析，提出了在家具设计过程中建立虚拟环境。* 基于虚拟现实技术基本理论就开发和设计虚拟环境的方法做了深入的研究。结合家具设计制造及室内设计的特点与要求，提出了用面向对象技术和面向智能体技术的方法开发和设计虚拟环境。* 着重研究了虚拟环境建模的各个环节。对虚拟环境的几何建模、形象建模、行为建模三个环节的建模原理和方法做了深入的研究与分析。并针对虚拟环境实时显示、快速成像的要求提出了用细节层次模型分割的方法优化虚拟环境模型，用可见性计算和多分辨率模型改进显示算法以提高系统对用户的响应速度。* 运用以上研究结果，以家具设计室内虚拟环境建模为应用实例，详细阐述了系统的设计思想及模型建立的方法与实现的有效途径。更多还原

【Abstract】 In recent years, virtual reality technology has been an active research area. And virtual environment is an important part of virtual reality because of its interaction, immersion and imagination. It helps people to enter virtual reality world created by computer directly to control the production and development of an event in a brand-new man-machine interactive mode. It brings people actual feel with multidimensional information space. The creation of virtual environment model is the key of virtual reality system. It is necessary to establish virtual reality environment in the process of furniture design. Virtual environment brings people an actual, vivid and inactive furniture exhibit room and provides an actual scene to furniture designer. This thesis refers to some research work based on a virtual reality subsystem in FCADS, an item developed by Chongqing University and Guangming Group. Firstly, combined with the characteristics and developing trend of the modern furniture manufacturing, this thesis analyzes the requirements for virtual environment in furniture manufacturing and proposes to establish virtual environment in the process of furniture design. Secondly, based on the basic theory of virtual reality technology and combined with the characteristics and requirements of indoor designing and furniture manufacturing., this thesis researches into the way of developing and designing the virtual environment and proposes to develop and design virtual environment by object-oriented technology and agent-oriented technology. Thirdly, this thesis researches into every link of virtual environment modeling. It analyzes the modeling theory and ways of the three links of geometric modeling, physical modeling and behavior modeling. Aiming at the requirements of virtual environment for real time display and quick image generation, it proposes to optimize virtual environmental model by dividing levels of detail model and to improve the algorithm by visibility computation and multi-resolution models in order to increase the response speed between system and user. Finally, this thesis expatiates on the design thought of the system, the effective way of modeling and implementation by using the foregoing research findings and taking indoor virtual environment modeling in furniture designing as the example.更多还原