Let me show you a picture. The rule is if I walk along C with S to my left then the normal vector is pointing up for me.

给你们看张图片，“相容”就是,如果我沿着C走，而且S在左边，法向量就是朝上的。

youdao

Let me show you a picture. The rule is if I walk along C with S to my left then the normal vector is pointing up for me.

给你们看张图片，“相容”就是,如果我沿着C走，而且S在左边，法向量就是朝上的。

youdao