【摘要】 用键盘控制大十字光标,在屏幕上进行交互绘图、并能在绘图机上输出图形。就二维图形研究了图形数据结构、图形菜单设计方法、基本图形的生成、二维几何构形、剖面线设计、尺寸标注、表面粗糙度设计和矢量汉字库的建立。并系统设计了良好的图形编辑方式。更多还原

【Abstract】 This system can display graphs on screen using the keyboard to control a big^{（?）+（?）}shape cursor and transmit the graphs to a plotter. Moreover it has a good editing function. Some problems are studied such as the graph data structure, method of designing graph menu, the forming of basic graph, two dimensional geometric modeling, crosshatching, dimensioning and assigning surface roughness sign and establishing of vector character library.更多还原