Another way to do it, of course, would provide actually parametric equations of these lines, get vectors along them and then take the cross-product to get the normal vector to the plane.
当然也有另一种方法，就是用参数方程表示这两条直线，用两条直线的方向向量作外积，从而得到切平面的法向量。
The Vector Product node computes the Dot Product of two vectors.
矢量积节点计算两个向量的数目积。
How to convert a tuple of vectors into a vector of tuples using the Cartesian product?
如何将一个元组向量为向量元组使用笛卡尔积？
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