The procedural approach to interactive design graphics

  • Authors:
  • Michael R. Dunlavey

  • Affiliations:
  • Charles Stark Draper Laboratory

  • Venue:
  • ACM SIGGRAPH Computer Graphics
  • Year:
  • 1979

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Abstract

A flexible system for interactive mechanical design can be easily built using ideas from Psychology and Automata theory. The language DL is such a system. It demonstrates that mechanical devices and shapes can be communicated by a simple universal language in contrast to a conventional menu-oriented approach. Rather than involving the user in conversation with some kind of three-dimensional model, the shape is described in terms of related two-dimensional projections, an idea explicated by Piaget. Though a simple system, DL's universality gives it abilities found only in large, complex systems, such as 3-d, translation, rotation, scaling, symmetry, construction lines, multiple views, definable modules, grids and arrays, relative coordinate systems, relational constraint obedience, selective display, selective modification, and pseudo motion.