Vector3.Slerp 球形插值

# [Vector3](Vector3.html).Slerp 球形插值

static function *Slerp* (*from* : [Vector3](Vector3.html), *to* : [Vector3](Vector3.html), *t* : float) : [Vector3](Vector3.html)

*Description* 描述

Spherically interpolates between two vectors.

球形插值在两个向量之间。

我感觉叫“弧线插值”更直观一些。

Interpolates from towards to by amount t. The returned vector's [magnitude](Vector3.magnitude.html) will be interpolated between
magnitudes of from and to.

通过 t 数值在 from 和 to 之间插值。返回的向量的长度将被插值到 from 到 to 的长度之间。

t is clamped between [0...1]. See Also: [Lerp](Vector3.Lerp.html)
function.

t 的值在[0...1]。

参见：[Lerp](Vector3.Lerp.html) 函数

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

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public Transform sunrise;
	public Transform sunset;
	void Update() {
		Vector3 center = sunrise.position + sunset.position * 0.5F;
		center -= new Vector3(0, 1, 0);
		Vector3 riseRelCenter = sunrise.position - center;
		Vector3 setRelCenter = sunset.position - center;
		transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, Time.time);
		transform.position += center;
	}
}
```

```
// Animates the position in an arc between sunrise and sunset.
//在日出和日落之间动画弧线
var sunrise : Transform;
var sunset : Transform;

function Update () {
	// The center of the arc
	//弧线的中心
	var center = (sunrise.position + sunset.position) * 0.5;
	// move the center a bit downwards to make the arc vertical
	//向下移动中心，垂直于弧线
	center -= Vector3(0,1,0);

// Interpolate over the arc relative to center
	//相对于中心在弧线上插值
	var riseRelCenter = sunrise.position - center;
	var setRelCenter = sunset.position - center;
	transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, Time.time);
	transform.position += center;
}
```