关键词: 偏移量, 自交, 区间算术, 四叉树

Abstract: Eliminating offset self-intersection could improve the ability to handle the detail of parts and the precision to make the parts. All kinds of method used around world and presented approach based on interval arithmetic and quad tree was presented. This method is good for detecting both local and global interactions. At last, gave examples for this method.

Key words: offsets, self-intersection, interval arithmetic, quad trees