This is a major challenge facing system on CAGD and has given rise to a number of alternative approaches: the wavelets-based surface modeling, the PDE surface modeling, the energy-based surface modeling and so on.

• 为了提高曲面设计的能力,简化复杂曲面的设计过程,近年来提出了一些新的曲面造型技术,如小波曲面造型方法、偏微分方程(PDE)曲面造型方法、能量曲面造型方法等。