Chapter 1 is the introduction . it discusses the structure and function of cad / cam system . the object - oriented method of cad / cam is discussed and the graphics interaction technology is introduced too 第一章是绪论部分，论述了cad cam系统的结构与功能和面向对象的cad cam应用软件设计方法，并介绍了图形交互技术。
In this paper the gesture description model is discussed based on pen interaction in which gestures can be seen as one kind of interactive resources . further discussion will give an interaction technology based on gesture and sketch 本文基于笔式交互，将手势作为一种交互资源，深入讨论了手势描述模型，进一步论述了基于手势和草图的交互技术。
In desktop computing environment , the style of human computer interaction has been changed from command user interface to multimedia graphical user interface which is a temporary alternative of natural human computer interaction mode 在桌面计算系统中人机接口已从早期的命令字符方式发展到现代的多媒体图形用户交互形式，并成为自然人机交互技术实现之前的一种过渡方式。
Through the application of the gesture - based interaction technique , the complex and clumsy interaction operations are replaced by simple strokes . the gesture interface technology consists of gesture recognition , gesture design and implementation of gesture interface 将基于笔划的手势交互技术引入到草图技术，由简单的手势笔划替代产品草图绘制过程中各种烦琐复杂的交互操作命令。
Finally , in order to improve the efficiency and naturalness of man - machine interaction , this dissertation study the 3d man - machine interface of the three - dimensional space interaction technology based on gesture and give a gesture recognition method based on hand model 最后，为提高用户在虚拟环境中人机交互的效率及自然性，本文研究了基于手势的三维空间交互技术，给出了一种基于手模型的手势识别方法。
3 . the technology of mutual function between user and computer in 3d topography is studied , in which the strongpoint and shortcoming in the method of positive solution and the method of oppositive solution is analyzed and their improvement is also presented 对三维地形交互技术进行了研究，深入分析了正解法与反解法两者之间的优劣及其各自的改进方法，同时提出了采用两者的结合来提高交互的精度和可靠性。
The system can achieve contour lines and elevations of the pavement board corners with the establishing of face models seriesly or one by one based on dynamic mutual techmology . the application system also has some small drawing and editting tools for the plane intersection design 系统使用动态交互技术，通过批量和单元face模型板块的建立，实现了等高线和板块板角高程的自动输出，系统也扩展了平交口平面设计中的一些绘图编辑工具。
To reach the goal , we have made a research on a lot of existing educational software , both commercial and experimental , studied how they interact with children . we have designed and implemented a musical educational system , in which we have made use of the result of our study 为了达到这个目标，我们分析了现有的各种儿童教育软件交互方式的特点，总结了各研究机构的研究工作，在研究的基础上利用多种交互技术设计了一个原型系统。
On concerning with the problems of the preprocessing and the postprocessing , it briefly introduces the theories of the computer graphics and discusses how to apply the interactive graphic technology in developing the structure analysis . on concern with the computing , it classifies the computing tasks of structure analysis programs with the concepts of oop and points out the hierarchy of the tasks . it also presents the ideas of constructing the structure analysis storehouse 在前后处理当中，本文着重运用计算机图形学的知识讨论了怎样将图形交互技术运用于结构分析程序的编制，在结构分析计算中则运用面向对象思想对结构分析程序的计算任务进行了分类，并指出了其中的层次关系，进行了类的设计，还针对不断发展的结构分析方法，提出了建立结构分析类库的思想。
Besides , this paper presented two experimental systems which adopt new methods and technologies presented in this paper . one system was jbcve ( java based collaborative virtual environment ) , which was developed to research on spatial and temporal sharing technology used in dve system having strict request on interaction and 此外，本文还介绍了采用以上创新技术的实验系统:一个是jbcve ，一个基于java的协同虚拟环境系统，主要对高度交互、协同的dve系统及相关的时间空间交互技术进行研究;一个是jtank ，一个基于java的网络游戏系统，主要对大规模的dve系统及与之相关的时间空间共享技术进行研究。
