【摘要】 随着远程教育的发展,学生的数量在急剧增多,为了将教师从繁重的作业批改中解脱出来,希望对于绘图作业可以实现自动批改的功能。文中讨论了在自行开发的网络绘图工具中,通过将三视图的二维投影利用坐标转化,建立三维的空间模型,使其在三个方向上生成尺寸树,利用这种尺寸树结构的遍历,来实现《机械制图》作业中的尺寸标注部分的自动批改。该软件基本实现了自动批改的功能,部分解决了尺寸标注批改的问题。以上功能是在基于VC6.0的MFC开发的绘图工具组件上实现的。更多还原

【Abstract】 With the development of the Net based distance education, the number of students is increasing rapidly. In order to set teachers free from the heavy tasks of revising the students’ works, a function that can check the works automatically is requisite. In this paper, a method is introduced to transform from projected points in three-view system to a model in special three-dimensional coordinates, and using the dimension trees in the three dimensions to correct students’ papers in Engineering Drawing automatically. This system can help teachers do their tasks partly. All the functions are realized on the system which is based on a ActiveX and the system is developed by MFC of VC 6.0.更多还原