面向组件编程之Unity 11.Quaternion类属性 线性插值Lerp() 关键字：按键控制游戏物体朝向

using System.Collections;using System.Collections.Generic;using UnityEngine;public class CarX : MonoBehaviour{    //两个四元数，存储左右方向    Quaternion qua;    Quaternion qub;    // Use this for initialization    void Start()    {        //Quaternion.LookRotation 注视旋转        //static function LookRotation(forward : Vector3, upwards: Vector3 = Vector3.up) : Quaternion        //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。        //LookRotation注视旋转        qua = Quaternion.LookRotation(transform.right);        qub = Quaternion.LookRotation(-transform.right);    }    // Update is called once per frame    void Update()    {                 //A D 控制旋转        bool isGe = Input.GetKey(KeyCode.A);        bool isGef = Input.GetKey(KeyCode.D);        if (isGe)        {            transform.rotation = Quaternion.Lerp(transform.rotation, qub, Time.deltaTime);        }        else if (isGef)        {            transform.rotation = Quaternion.Lerp(transform.rotation, qua, Time.deltaTime);        }    }}