为了解决CAD水平测试的自动化阅卷问题，实现AutoCAD绘图题的计算机判分，提取CAD图形数据信息是关键。研究了三维几何造型开发工具ACIS的模型及其存储文件SAT的格式，给出了一种从SAT文件中提取CAD图形数据信息的方法，通过实例验证了该方法的有效性和正确性。-CAD proficiency test in order to solve the problem of automated scoring, AutoCAD drawing to achieve sub-sub-theme co

CAD三维制图 三维绘图术语和坐标系 ◆视图观测点的设立方法 ◆绘制三维点和曲线 ◆绘制三维网格 ◆绘制三维实体 ◆通过二维对象创建三维对象 -◆ view observation points set up method of CAD 3D drawing 3D graphics terminology and coordinate system ◆ draw the 3D points and curves In ◆ draw three-dimensional

这是学习cad三维制图最经典的实例，能够使初学者在最短时间内提升自己的绘图技巧。具有很大的学习价值。-This is an example of learning CAD three-dimensional mapping of the most classic, can enable beginners to improve their drawing skills in the shortest time. Having great learning value.