Tuparev G, Vriend G, Sander C
European Molecular Biology Laboratory, Heidelberg, Germany.
J Mol Graph. 1992 Mar;10(1):12-6. doi: 10.1016/0263-7855(92)80003-v.
The Graphics Command Interpreter (GCI) is an independent server module that can be interfaced to any program that needs interactive three-dimensional (3D) graphics capabilities. The principal advantage of GCI is its simplicity. Only a limited set of powerful features have been implemented, including object management, global and local transformations, rotation, translation, clipping, scaling, viewport operations, window management, menu handling and picking. GCI and the master (client) program it serves run concurrently, communicating over a local or remote TCP/IP network. GCI sets up socket communication and provides a 3D graphics window and a terminal emulator for the master program. Communication between the two programs is via ASCII strings over standard I/O channels. The implied language for messages is very simple. GCI interprets messages from the master program and implements them as changes of graphical objects or as text messages to the user. GCI provides the user with facilities to manipulate the view of the displayed 3D objects interactively, independently of the master program, and to communicate mouse-controlled selection of menu items or 3D points as well as keyboard strings to the master program. The program is written in C and initially implemented using the Silicon Graphics GL graphics library. As the need to link special libraries to the master program is completely avoided, GCI can very easily be interfaced to existing programs written in any language and running on any operating system capable of TCP/IP communication. The program is freely available.
图形命令解释器（GCI）是一个独立的服务器模块，可与任何需要交互式三维（3D）图形功能的程序进行接口连接。GCI的主要优点是其简单性。它只实现了一组有限的强大功能，包括对象管理、全局和局部变换、旋转、平移、裁剪、缩放、视口操作、窗口管理、菜单处理和拾取。GCI及其所服务的主（客户端）程序并发运行，通过本地或远程TCP/IP网络进行通信。GCI建立套接字通信，并为主程序提供一个3D图形窗口和一个终端模拟器。两个程序之间的通信通过标准I/O通道上的ASCII字符串进行。消息所隐含的语言非常简单。GCI解释来自主程序的消息，并将其实现为图形对象的更改或作为给用户的文本消息。GCI为用户提供了一些工具，可独立于主程序交互式地操作所显示的3D对象的视图，并将鼠标控制的菜单项或3D点的选择以及键盘字符串传达给主程序。该程序用C编写，最初使用Silicon Graphics GL图形库实现。由于完全避免了将特殊库链接到主程序的需要，GCI可以非常容易地与用任何语言编写并在任何能够进行TCP/IP通信的操作系统上运行的现有程序进行接口连接。该程序可免费获取。
