Quaternion.LookRotation 注视旋转

# [Quaternion](Quaternion.html).LookRotation 注视旋转

function *LookRotation* (*forward* : [Vector3](../Vector3/Vector3.html), *upwards* : [Vector3](../Vector3/Vector3.html) = [Vector3.up](../Vector3/Vector3.up.html)) : void

*Description* 描述

Creates a rotation that looks along forward with the the head upwards along
upwards

创建一个旋转，沿着 forward（z 轴）并且头部沿着 upwards（y 轴）的约束注视。也就是建立一个旋转，使 z 轴朝向 view ?y 轴朝向 up。

Logs an error if the forward direction is zero.

如果 forward 方向是 0，记录一个错误。

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public Transform target;
	void Update() {
		Vector3 relativePos = target.position - transform.position;
		Quaternion rotation = Quaternion.LookRotation(relativePos);
		transform.rotation = rotation;
	}
}
```

```
// Most of the time you can use:
// transform.LookAt instead
//大多数时间你可以使用transform.LookAt代替
var target : Transform;
function Update () {
	var relativePos = target.position - transform.position;
	var rotation = Quaternion.LookRotation(relativePos);
	transform.rotation = rotation;
}
```