微机图形显示的屏幕编辑功能

Graphic Edit Functions Available on Microcomputers

图形屏幕编辑功能是实现交互式计算机绘图的重要手段之一.本文主要介绍一种适用微型计算机的图形屏编辑系统.该系统用FORTRAN 77编写,在IBM-PC机上实现.它的主要特点是,图形编辑功能强、使用方便,易于移植.文中介绍了每一个菜单项的主要功能、图形的数据结构、线段裁剪算法和部分应用实例.

A graphic edit system on microcomputer is presented in this paper, which is coded in FORTRAN 77. and runs on an IBM-PC microcomputer. The good points of the system are: powerful edit ability, being convenient to use and good transportability All of the functions of the system are designed in screen menu items for user to select. The action of each nenu item is introduced. The data structure, line clipping algorithm and some application examples are also described.