Graohics Abstraction Model for SEICAD Masanobu Ikuo Shinji Matsuo Kondo Tsunoda 15, Kitahama, Higashi-ku, Osaka, Japan Information Systems Dept. Sumitomo Electric Industries, Ltd. Abstract The data abstraction approach to design of a Graphics Abstraction Model (CAM) for 3D solid objects and 2D picture views is described. The main idea is to represent graphical objects including instances of certain views by abstraction data types and data abstraction models using functional dependencies, Compound objects constructed which basically use the algebraic approach. (ASSEMBLE, UNION, etc.) on by several ACTION operations primitive 3D entities can be handled as compound entities. defined as data abstractions. Points, lines, and faces are lines and faces General drawing facilities such as points, also can be used by commands under 3D coordinates data. I. Introduction At zresent, a few database management systems for graphical applic:~tions are designed for efficient storage and retrieval of graphical data. graphical data require a large In addition, because a amount of storage even for picture views of average complexity. graphical 3D object has various instances of views, lots of duplicated coordinate data are required. The problem of efficient, economical storage and retrieval of a vast amount of 6raphical information becomes more important
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Graphics abstraction model for SEICAD
Matsuo, Masanobu; Kondo, Ikuo; Tsunoda, Shinji
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, Volume 11 (1)
Association for Computing Machinery – Jan 1, 1981
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