THRED: a two-handed design system

  • Authors:
  • Chris D. Shaw;Mark Green

  • Affiliations:
  • Department of Computer Science, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada;Department of Computing Science, University of Alberta, Edmonton, Alberta T6G 2H1, Canada

  • Venue:
  • Multimedia Systems - Special issue on multimedia and multisensory virtual worlds
  • Year:
  • 1997

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Abstract

This paper describes a computer-aided design system for sketching free-form polygonal surfaces such as terrains and other natural objects. The user manipulates two 3D position and orientation trackers with three buttons, one for each hand. Each hand has a distinct role to play, with the dominant hand being responsible for picking and manipulation, and the less dominant hand being responsible for context setting of various kinds. The less dominant hand holds the workpiece, sets which refinement level that can be picked by the dominant hand, sets the constraint mode and the reshape operator, and generally acts as a counterpoint to the dominant hand. In this paper, the architecture of the system is outlined, the interaction techniques are presented, and a simple surface is shown.