Titlebook: Computer Graphics Programming; GKS — The Graphics S Günter Enderle,Klaus Kansy,Günther Pfaff Book 19841st edition Springer-Verlag Berlin He

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The GKS Metafile for storing pictures are called graphics metafiles. Within the International Organization for Standardization (ISO), working group TC97/SC5/WG2 “Computer Graphics” has set up a metafile subgroup that defined graphics metafiles as follows [IS081a]:

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States and State Listslues of state variables contained in a number of state lists present in a GKS system. The effects of functions are partly defined as the change of values in state lists that is caused by their invocation. The operating state has one of the following five values:

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Springer-Verlag Berlin Heidelberg 1984

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phical standard. When the end of this process could be foreseen and the International Standard "Graphical Kernel System" (GKS) was cast into its. final form, the urgent need arose for detailed information to the graphics community about this stan- dard and for the education of graphics programmers.

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https://doi.org/10.1057/9780230316591plotter. Three important types of users can be identified: the system implementors, the application programmers, and the graphical workstation operators. Figure 3.1 shows the relationship between the different types of computer graphics users.

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Paul Chamness Miller,Hidehiro Endorequirements while maintaining device independence, three coordinate systems have been defined in GKS. The application programmer uses the world coordinate (WC) system for specifying picture elements. The world coordinate system is the standard user coordinate system.