Question

JavaScript => static function Angle(from: Vector3, to: Vector3): float;
C# => static float Angle(Vector3 from, Vector3 to);

Parameters 参数

from	The angle extends round from this vector. 角度从这一向量扩展开。
to	The angle extends round to this vector. 角度扩展至这一向量

Description 描述

Returns the angle in degrees between from and to.

由from和to两向量返回一个角度。形象的说，from和to的连线和它们一个指定轴向的夹角。

The angle returned is always the acute angle between the two vector (ie, the smaller of the two possible angles between them and never greater than 180 degrees).

返回的角度总是两个向量之间的锐角(也就是说,它们之间2个可能的角度中较小的那个,不大于180度)。

JavaScript:

	// prints "close" if the z-axis of this transform looks
	// almost towards the target	var target : Transform;
	function Update () {
		var targetDir = target.position - transform.position;
		var forward = transform.forward;
		var angle = Vector3.Angle(targetDir, forward);
		if (angle < 5.0)
			print("close");
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public Transform target;
    void Update() {
        Vector3 targetDir = target.position - transform.position;
        Vector3 forward = transform.forward;
        float angle = Vector3.Angle(targetDir, forward);
        if (angle < 5.0F)
            print("close");
 
    }
}

Vector3