Face and Vertex Normal Vectors 面和顶点法向量
unit normal vectors 单位法向量
cross product of normal vectors 法向叉乘
normal cyclic characteristic vectors 标准循环特征向量组
Any plane actually has infinitely many normal vectors.
每一个平面都有无数条法向量。
The first unit about cross-products,normal vectors and so on is actually useful now.
第一单元学得叉积、法向量这些,现在就有用了。
Here we don't have a notion of orienting the surface other than by precisely choosing one of the two possible normal vectors.
这里我们并没有曲面定向的概念，能做的就是，从两个法向量中选出一个作为正方向。
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