vertex face

基本解释

A nonorientable map with one vertex and one face is called a barfly.
一个不可定向地图，如果只有一个顶点和一个面，则称它为一个魔。
The normal at a vertex should be computed as the normalised sum of all the unit length normals for each face the vertex shares.
这个顶点的法线就应该是所有共享面法线的和在归一化的结果。
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It is proposed that construct cutaway plane with elements on the 3D solid(vertex, edge and face). The methods for locate cutaway plane precisely are also explained.
通过分析应用要求，提出了利用三维实体上的元素（点、线、面）构造剖切面，以及对剖切面进行精确定位的方法。