ARPG游戏摄像机视野控制脚本---光标、旋转、缓动等效果代码：

using UnityEngine;
using System.Collections;
 
//自由旋转相机视角
//脚本绑定A空对象，A空对象在角色脚底，A空对象绑定一个B空对象，B空对象绑定一个摄像机
public  class FreeLookCamPractice : AbstractTargetFollowerPractice
{
 
    [SerializeField] private float moveSpeed = 1;           //移动速度
 
    [Range(0, 10)]
    [SerializeField] private float TurnSpeed = 5.5f;        //转动速度
    [SerializeField] private float TurnSmoothing = 0.1f;    //转动平滑值
    [SerializeField] private float tiltMax = 75;            //倾斜最大值
    [SerializeField] private float tiltMin = 45;            //倾斜最小值
    public bool lookCursor = false;     //隐藏锁定光标
 
    private float lookAngle;                //看的角度   左右
    private float tiltAngle;                //倾斜角度  上下
    private Transform pivot;                //枢轴中心点
    private PersonCharacters character;         //脚本引用
    private const float LookDistance = 100;                 //看的距离
    private float smoothX = 0;              //平滑X
    private float smoothY = 0;              //平滑Y
    private float smoothXvelocity = 0;      //平滑X速率
    private float smoothYvelocity = 0;      //平滑Y速率
 
    void Awake()
    {
        pivot = transform.GetChild (0);     //脚本绑定的游戏物体子对象是枢轴中心，应该在人物头顶         枢轴中心的子对象是相机
    }
 
    void Update()
    {
        HandleRotationMovement ();
    }
    protected override void FollowTarget(float deltaTime)
    {
                        //插值                脚本位置，玩家位置，time.deltaTime * 1
        //第三参数是0时返回transform.position,1时返回target.position,0.5返回平均数
        transform.position = Vector3.Lerp (transform.position, target.position, deltaTime * moveSpeed);
    }
    void HandleRotationMovement ()
    {
        float x = Input.GetAxis ("Mouse X");        //跨平台输入，需要包含脚本，不然就换Input
        //启用垂直方向的视野改变
        //float y = Input.GetAxis ("Mouse Y");
        //取消垂直方向的视野改变
        float y = 0f;
 
        if (TurnSmoothing > 0)       //如果使用平滑
        {
            smoothX = Mathf.SmoothDamp (smoothX, x, ref smoothXvelocity, TurnSmoothing);        //平滑阻尼，左右移动平滑，TurnSmoothing是缓冲时间
            smoothY = Mathf.SmoothDamp (smoothY, y, ref smoothYvelocity, TurnSmoothing);        //平滑阻尼，上下移动平滑，TurnSmoothing是缓冲时间
        }
        else
        {
            smoothX = x;
            smoothY = y;
        }
 
        lookAngle += smoothX * TurnSpeed;       //Y旋转，左右的，每帧加一点
        transform.rotation = Quaternion.Euler (0, lookAngle, 0);        //转换成欧拉角才能赋值给rotation
 
        tiltAngle -= smoothY * TurnSpeed;       //用减是因为，鼠标向下是是小于0的值，但向上是要加的
        tiltAngle = Mathf.Clamp (tiltAngle, -tiltMin, tiltMax);
 
        //旋转B子对象是因为视角要对齐到头顶
        pivot.localRotation = Quaternion.Euler (tiltAngle, 0, 0);
        Screen.lockCursor = lookCursor;     //锁定或解锁光标
    }
}