Vector2.Angle

# [Vector2](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector2.html).Angle

public static float **Angle** ([Vector2](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector2.html) **from**, [Vector2](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector2.html) **to**);

## 参数

| from | 测量角度差的源向量。   |
| ------ | ------------------------ |
| to   | 测量角度差的目标向量。 |

## 描述

返回 `from` 与 `to` 之间的无符号角度（以度为单位）。

返回的角度为两个向量之间的无符号锐角。也就是说，使用两个向量之间的两个可能角度中的较小者。结果永远不会超过 180 度。

另请参阅：[SignedAngle](https://docs.unity3d.com/cn/2019.4/ScriptReference/Vector2.SignedAngle.html) 函数。

```
using UnityEngine;

public class Vector2Angle : MonoBehaviour
{
    //Use these to get the GameObject's positions
    Vector2 m_MyFirstVector;
    Vector2 m_MySecondVector;

float m_Angle;

//You must assign to these two GameObjects in the Inspector
    public GameObject m_MyObject;
    public GameObject m_MyOtherObject;

void Start()
    {
        //Initialise the Vector
        m_MyFirstVector = Vector2.zero;
        m_Angle = 0.0f;
    }

void Update()
    {
        //Fetch the first GameObject's position
        m_MyFirstVector = m_MyObject.transform.position;
        //Fetch the second GameObject's position
        m_MySecondVector = m_MyOtherObject.transform.position;
        //Find the angle for the two Vectors
        m_Angle = Vector2.Angle(m_MyFirstVector, m_MySecondVector);
    }

void OnGUI()
    {
        //Output the angle found above
        GUI.Label(new Rect(25, 25, 200, 40), "Angle Between Objects" + m_Angle);
    }
}
```