unity 3d 中的quaternion.Slerp的作用以及用法

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<span style="font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="csharp">using UnityEngine;using System.Collections;public class enemyAI : MonoBehaviour {public Transform target;public int moveSpeed;public int rotationSpeed;private Transform myTransform;void Awake() {myTransform = transform;}// Use this for initializationvoid Start () {GameObject go = GameObject.FindGameObjectWithTag ("Player");target = go.transform;}// Update is called once per framevoid Update () {Debug.DrawLine (target.transform.position, myTransform.position, Color.yellow);// look at targetmyTransform.rotation = Quaternion.Slerp (myTransform.rotation,Quaternion.LookRotation(target.position-myTransform.position),                                         rotationSpeed*Time.deltaTime);// move to targetmyTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;}}

<span style="font-family: Arial, Helvetica, sans-serif;">忽略掉什么叫做四元数平滑插值这种复杂的概念，这个方法的意思其实就是：让初始点面朝目标点。第三个参数的意思是让初始点转多少度才能面朝目标点。参数意思是从from 的rotation慢慢旋转增值到to.rotation.以多少的角度旋转，把其中的值插到这个中间过程中，就是这个方法所要表达的意思。</span>

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官方文档上这么写的：

static function Slerp (from : Quaternion, to : Quaternion, t : float) : QuaternionDescription描述Spherically interpolates from towards to by t.球形插值，通过t值from向to之间插值。C#JavaScript// Interpolates rotation between the rotations// of from and to.// (Choose from and to not to be the same as// the object you attach this script to)//在from和to之间插值旋转.//(from和to不能与附加脚本的物体相同)var from : Transform;var to : Transform;var speed = 0.1;function Update () {transform.rotation = Quaternion.Slerp (from.rotation, to.rotation, Time.time * speed);}

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