Vector3.Cross

描述

两个向量的叉积。

两个向量的叉积会产生一个第三个向量，该向量垂直于这两个输入向量。结果的大小等于两个输入的大小相乘，然后乘以它们之间角度的正弦值。您可以使用“左手定则”确定结果向量的方向。


应用于 Cross(a, b) 的左手定则。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    // Get the normal to a triangle from the three corner points a, b, and o, where o is the origin point of vectors a and b.
    Vector3 GetNormal(Vector3 a, Vector3 b, Vector3 o)
    {
        // Find vectors corresponding to two of the sides of the triangle.
        Vector3 side1 = a - o;
        Vector3 side2 = b - o;

        // Cross the vectors to get a perpendicular vector, then normalize it. This is the Result vector in the drawing above.
        return Vector3.Cross(side1, side2).normalized;
    }
}