In terms of cartoon expression, Lasseter [Jon87a] is very likely the first paper to describe the basic principles of traditional two-dimensional hand-drawn animation and their application to three-dimensional computer animation. In this paper, he clearly describes cartoon animation and what it requires of an animator. Paul Noble and Wen Tang [Pno04a] achieved cartoon hair modeling and animation by using NURBS Surfaces to model the primary shape and motion of cartoon character hair.