EXTENSIONS TO THE PL/I LANGUAGE FOR INTERACTIVE COMPUTER GRAPHICS

Abstract

The report presents a proposed combination of the IBM Conversational Programming System (CPS) and the Rand Programmer-Oriented Graphics Operation (POGO). CPS is entirely typewriter oriented and uses a subset of PL/I with the ON-conditions and complete file I/O that are necessary in building an interactive graphical language. The facilities of POGO, which allow the user to draw on a screen the objects he wishes displayed, to label and name objects, and to define where to display appropriate items, are provided by these extensions to the language: (1) one new statement, DISPLAY, signalling the creation of a named display page; (2) additional options in the PUT and GET statements; and (3) an additional ON-condition, PUSH, that relates light-pen actions to asynchronous program responses.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1970
Accession Number
AD0709905

Entities

People

  • D. J. Farber
  • Richard H. Anderson

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Command And Control
  • Computer Graphics
  • Computer Programming
  • Computers
  • Consoles
  • Construction
  • Graphics
  • Language
  • Light Pens
  • Parallel Computing
  • Parallel Processing
  • Personality
  • Programming Languages
  • Prototypes
  • Terminals

Fields of Study

  • Computer science

Readers

  • Computer Science.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.