Information processing systems. Computer graphics. Graphical kernel system for three dimensions (GKS-3D) functional description
Information processing systems. Computer graphics. Graphical kernel system for three dimensions (GKS-3D) functional description
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1 Scope and field of application This International Standard specifies a set of functions for computer graphics programming, the Graphical Kernel System for Three Dimensions (GKS-3D). GKS-3D is a basic graphics system for applications that produce computer generated three dimensional pictures on graphics output devices. It supports operator input and interaction by supplying basic functions for graphical input and picture segmentation. It allows storage and dynamic modification of pictures. A fundamental concept in GKS-3D is the workstation , consisting of a number of input devices and a single output device. Several workstations can be used simultaneously. The application program is allowed to adapt its behaviour at a workstation to make best use of workstation capabilities. This International Standard includes functions for storage on and retrieval from an external graphics file. Also, the functions are organized in upward compatible levels with increasing capabilities. This International Standard provides application programs with the capability to define and display 3D graphical primitives, specified using 3D coordinates. In addition, the GKS-3D input model provides 3D locator and stroke input. The output primitives of this International Standard differ from the output primitives of ISO 7942 in the following ways:
a) the polyline and polymarker primitives are defined by an arbitrary sequence of...
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