The n-sided control point surfaces without twist constraints
In (Zheng and Ball, 1997), an n-sided control point surface is presented. For the cases n = 3, 5, and 6, Hall and Mullineux (1999) generalized Zheng-Ball construction so that corner twist vectors are avoided. This paper generalizes Hall and Mullineux's results to arbitrary n-sided cases. (C) 2001 Elsevier Science B.V. All rights reserved.
control point surfaces zheng-ball construction symmetric parameters n-sided surfaces