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Issue No.05 - September/October (1989 vol.9)
pp: 48-56
<p>The article was motivated by J. Blinn's column on the many ways to draw a circle (see ibid., vol.7, no.8, p.39-44, 1987). The authors have found several other ways to represent the circle as a nonuniform rational B-spline curve, which they present. Square-based methods, infinite control points, triangle-based methods, general circular arcs and rational cubic circles are some of the methods and types of circle discussed.</p>
Leslie Piegl, Wayne Tiller, "A Menagerie of Rational B-Spline Circles", IEEE Computer Graphics and Applications, vol.9, no. 5, pp. 48-56, September/October 1989, doi:10.1109/38.35537
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