a portable graphics system for minicomputers
PIGLI (Portable Interactive Graphics Language Interpreter) is a high-level interactive graphics system implemented on an INTERDATA 8/32 minicomputer. PIGLI is written in sequential PASCAL and executes under the SOLO operating system, which is written in concurrent PASCAL and has been shown to be highly portable. This paper describes the major features of the PIGLI system including interactive programming commands, flexible hierarchic picture generation, referencing functions, query commands, exec files, and device independent output commands. In addition, the paper discusses the program design and its relationship to operating system and space considerations.
pascal computer graphics portable software minicomputer system high-level graphics language