Combined with adaptive subdivision scheme, analgorithm to modify topology of control mesh is presented and implemented for generatingthe sharp features over hybrid subdivision surface adaptively. It makes sharp features likecrease, cone, dart and corner.

• 本文运用自适应细分原理,提出了基于控制网格拓扑修改的混合细分曲面自适应尖锐特征生成算法,在混合细分曲面上实现了折痕、锥、刺、角等尖锐特征;