指定计算机图形编程的一组功能，即三维图形内核系统（GKS-3D）作为图形输出设备上计算机生成的三维图片的基本图形系统。提供应用程序来定义和显示使用三维坐标指定的三维图形图元。提供了用于存储外部图形文件和从外部图形文件中检索的功能，这些功能以向上兼容的级别组织，功能不断增强。定义了其他函数以生成输出原语。

Specifies a set of functions for computer graphics programming, i.e. the Graphical Kernel System for Three Dimensions (GKS-3D) as the basic graphics system of computer-generated three dimensional pictures on graphics output devices. Provides application programs to define and display 3D graphical primitives, specified using 3D coordinates. Functions are provided to for storage on and retrieval from an external graphics file with the functions being organized in upward compatible levels with increasing capabilities. Additional functions are defined to generate output primitives.