The half-edge mesh structure is a manifold boundaryrepresentation, useful for writing tools that rely on quick adjacency queries and a uniform orientation.
介绍，半边网格结构是一个多能的边界表示法，在编写快速边界邻接查询和统一定位方面的工具非常有用。
2
At present, the CAD system always USES hybrid representations of feature representation and boundaryrepresentation in order to take advantages of both representations.
目前，在CAD系统中，一般采用特征表示和边界表示的混合表示方法，以充分利用两种表示法的优点。
3
Boundary processing includes boundary extraction and boundaryrepresentation. It is a basic research in image processing and analysis and is also a problem which isn't complete solved.