This paper presents an explicit formula that converts a triangular Bezier p
atch of degree n to a degenerate rectangular Bezier patch of degree n x n b
y reparametrization. Based on this formula, we develop a method for approxi
mating a degenerate rectangular Bezier patch by three nondegenerate Bezier
patches; more patches can be introduced by subdivision to meet a user-speci
fied error tolerance. (C) 2001 Elsevier Science B.V. All rights reserved.