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Howard T. Moncarz 《Journal of research of the National Institute of Standards and Technology》2002,107(2):193-205
Geometric dimensioning and tolerancing (GD&T) is a method to specify the dimensions and form of a part so that it will meet its design intent. GD&T is difficult to master for two main reasons. First, it is based on complex 3D geometric entities and relationships. Second, the geometry is associated with a large, diverse knowledge base of dimensional metrology with many interconnections. This paper describes an approach to create a dimensional metrology knowledge base that is organized around a set of key concepts and to represent those concepts as virtual objects that can be navigated with interactive, computer visualization techniques to access the associated knowledge. The approach can enable several applications. First is the application to convey the definition and meaning of GD&T over a broad range of tolerance types. Second is the application to provide a visualization of dimensional metrology knowledge within a control hierarchy of the inspection process. Third is the application to show the coverage of interoperability standards to enable industry to make decisions on standards development and harmonization efforts. A prototype system has been implemented to demonstrate the principles involved in the approach. 相似文献
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论述了一个网络化,信息化实验系统开发的方法和思路。该系统以虚拟技术为支撑,以图学教育的宗旨为核心,综合利用了虚拟技术的各种开发工具和理论,具有虚拟现实系统常有的特点,沉浸感,交互性,构想。 相似文献
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Feng Kaiping Zuo Zongyi Guangdong University of Technology Guangzhou China 《计算机辅助绘图.设计与制造(英文版)》2002,(1)
Techniques of Viewpoint-binding, interactive Viewpoint-animation interaction and their realization with VRML2 are illustrated 相似文献
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虚拟现实建模语言VRML(VirtualRealityModelingLanguage),其本身是以文件的形式组织的,如果构建起一个可扩展的复杂三维世界,文件之间的关系将非常复杂,不便于操作。数据库对存储数据有着方便灵活的管理,VRML与数据库技术的结合不失为是一种较好的解决方案。文中通过对VRML文件的分析,提出了一种以节点为单位存储的方案,设计了基于VRML节点的数据库管理系统,协助组织和生成新的VRML世界。以鉴湖校区为例,搭建了部分三维模型的虚拟校园,可供用户浏览和访问。 相似文献