Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
Communications of the ACM
An extended Algol-60 for Shaded Computer Graphics
The papers of the ACM symposium on Graphic languages
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The implementation of an interactive design tool using computer graphics techniques to produce high quality visual aids is described. The generated two-dimensional shaded images are composed of both pre-defined and user-defined opaque shapes used in conjunction with character strings. The user interface is simple and easy to use. User interaction is primarily via a large data tablet used to specify shapes and control image manipulation. The system alleviates many of the tedious mechanical aspects of visual aid production and allows concentration on the more creative aspects. There is immediate visual feedback for all actions. Implementation was done using a graphics extented Algol-60 in conjunction with an interactive real-time shaded graphics system. This operational system has produced a number of visual aids including those accompaning this paper.