Namely, we will be saying the /a normal vector is x, y, z over a, plus or minus depending on whether we want it pointing in or out.

我们容易知道,法向量为，正负号取决于它是指向外面还是里面。

youdao

Namely, we will be saying the /a normal vector is x, y, z over a, plus or minus depending on whether we want it pointing in or out.

我们容易知道,法向量为，正负号取决于它是指向外面还是里面。

youdao