说明：  这是一个以色列的研究人员作的一个关于三角网格的编辑方面的研究而做的PPT，非常厉害，有 人在做这方面的可以看看，他的PPT。不过是英文的，有些难，
(This is a study in Israel for a triangular mesh on the editorial aspects of the research done PPT, very powerful, some people are doing in this area can look at, and his PPT. But in English, and some difficult,)