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TO COMPUTER GRAPHICS BASED ONGKS Part I gives an introduction to
basic concepts of computer graph ics and to the principles and
concepts of GKS. The aims of this part are twofold: to provide the
beginner with an overview of the terminology and concepts of
computer graphics, based on GKS, and to give the computer graphics
expert an introduc tion to the GKS standard. In the early chapters
of this part, the main areas of computer graphics, the various
classes of com puter graphics users, the interfaces of GKS and its
underlying design concepts are discussed and important terms are
defined. The later chapters give an informal introduction to the
main concepts of GKS and their interrelationships: output,
attributes, coordinate systems, transformations, input, segments,
metafile, state lists, and error handling. This introduction to the
GKS framework will prepare the ground for the detailed description
of 2D GKS functions in Part III and the 3D extensions to GKS in
Part IV. 1 WHAT IS COMPUTER GRAPHICS? 1. 1 Defmition of Computer
Graphics The Data Processing Vocabulary of the International
Organization for Stan dardization (ISO) ISO 84] defines Computer
Graphics as follows: "Methods and techniques for converting data to
and from a graphic display via computer. " This definition refers
to three basic components of any computer graphics system - namely
"data," "computer," and "display.""
This book is the sixth issue in the EurographicSeminars Series.
This series has been set up by Eurographics, the European
Association for Computer Graphics, in order to disseminate surveys
and research results out of the field of Computer Graphics.
Computer Graphics constitute a powerful and versatile tool for
various application areas. The rapidly increasing use of Computer
Graphics techniques and systems in many areas is caused by the
availability of more powerful hardware at lower prices, ' by the
concise specification of Computer Graphics Interfaces in
commonly..agreed standards, and by the inven tion of new and often
astonishing methods and algorithms for com position andpreserit
ti6n of pictJres and for graphical interaction. While s, o e issues
of this se.ries contain latest research results, e.g. the issues in
window management systems or user interface manage ment systems,
this book has the character of a state-of-the-art survey on
important areas .of Computer Graphics. Starting from current
practice and agreed consens, it will lead to the latest
achievements in this field. The contributions in this issue are
largely based on tutorials and seminars held at the Eurographics
conferences 1984 in Copen hagen and 1985 in Nice."
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