Computer-aided hierarchical diagrams

  • Brown A
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Abstract

The user interface of a diagram-drawing program, DIAG2, is described. The user is provided with three basic constructs: the straight line, the segment of a circle and the block of text. These constructs may be assembled into larger groups. Thus a diagram can be built up in a hierarchical manner by the user. DIAG2 performs the unwrapping operations necessary to decompose the diagram into a set of straight line segments, which can be output to the appropriate display peripheral. No intelligence is required in the graphics device itself. © 1984.

Author-supplied keywords

  • DIAG
  • hierarchical diagramming
  • nonlinear transformation

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Authors

  • A. D. Brown

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