ISO/IEC 9592-1-1997 信息技术 计算机图形和图像处理 程序员分级交互图形系统(PHIGS) 第1部分:功能描述

标准号：ISO/IEC 9592-1-1997
中文标准名称：信息技术 计算机图形和图像处理 程序员分级交互图形系统(PHIGS) 第1部分:功能描述
英文标准名称：Information technology - Computer graphics and image processing - Programmer's Hierarchical Interactive Graphics System (PHIGS) - Part 1: Functional description
标准类型：L81
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：L81
国际标准分类号：35.140
适用范围：This part of ISO/IEC 9592 specifies a set of functions for computer graphics programming, the Programmer's Hierarch-ical Interactive Graphics System (PHIGS). PHIGS is a graphics system for application programs that produce computer generated pictures on output devices. It supports operator input and interactions by supplying basic functions for graph-ical input and hierarchical picture definition. Picture definitions can be retained centrally where they may be edited by an application. Alternatively, graphical data may be processed without first storing it. To assist in this processing, explicit control over resources used to encapsulate the results of these processing operations is provided. Basic application requirements in the areas of lighting and shading are provided through primitives and functions for controlling the rendering of 3D objects. Utilization of raster images in the generation of PHIGS pictures is provided. Pictures are displayed on output devices which may have associated input devices. Several input devices can be used simultaneously. The application program is allowed to adapt its behaviour to make best use of their capabilities. Graphical output can be constrained to particular views. Views can be specified parametrically and automatic process-ing of input operations can be used to control viewing. New input devices can be defined from the capabilities avail-able. Functions are specified for archiving picture definitions to file. In addition an interface to the Computer Graphics Metafile (ISO/IEC 8632) is described. This part of ISO/IEC 9592 defines a language independent nucleus of a graphics system for integration into a program-ming language. PHIGS is embedded in a language layer obeying the particular conventions of the language. Such language bindings are specified in ISO/IEC 9593.