Principles of interactive computer graphics (2nd ed.)
Principles of interactive computer graphics (2nd ed.)
Communications of the ACM
Three-dimensional design by graphical man-computer communication.
Three-dimensional design by graphical man-computer communication.
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Speakeasy is an extensible interpretive computer language that enjoys widespread usage on a number of large-scale timesharing systems. An adaptation of Speakeasy implemented on a PDP-II minicomputer using the UNIX timesharing system is described. The minicomputer version contains many of the basic processor features of the distributed system while maintaining a high degree of language compatibility. The development of the system, however, has stressed adapting and extending the language and processor for research and instruction in a dynamic interactive graphics environment. The description emphasizes basic implementation features and examples of the graphic extensions.