c++ - 如何模拟左手法则？

Question

我使用一个结构体来表示这样的方向:

struct POINT{
double x;
double y;
double z; 
}

给定 B(Bx,By,Bz) 和 I(Ix,Iy,Iz)。如何确定F？

Answer 1

您的问题实际上是 vector cross-product 的算法是什么.

POINT F;
F.x = (B.y * I.z) - (B.z * I.y);
F.y = (B.z * I.x) - (B.x * I.z);
F.z = (B.x * I.y) - (B.y * I.x);