Design techniques for the definition of solid objects with free-form geometry

  • Authors:
  • T. Várady;M. J. Pratt

  • Affiliations:
  • Computer & Automation Institute, Hungarian Academy of Sciences, Budapest, Hungary;Cranfield Institute of Technology, Cranfield, Bedford, England

  • Venue:
  • Computer Aided Geometric Design
  • Year:
  • 1984

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Abstract

Solid modellers and free-form surface systems have been evolving to a large extent separately for fifteen years or more. Free-form surface techniques must now be integrated into solid modelling systems, since many engineering parts involve this type of geometry. The present paper classifies free-form surfaces into four categories for design purposes, depending on the degree of geometric constraint involved in their definition. Proposals are then made for free-form design techniques suitable for use in solid modellers. A survey of existing solid modelling systems is included, with indications of the techniques currently available for the design of free-form solids.