unity Camera第一人称移动,3中方法实现

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Player : MonoBehaviour {
    public GameObject CapsulePlayer, MainCamerahead;
    private float aixsX, aixsY, mouseScroll;
    private int moveSpeed;
    private int standardMoveSpeed = ;
    private int runMoveSpeed = ;
    private int mouseScrollSpeed = ;
    private float mouseScrolbackSpeed = 0.05f;
    private CharacterController charaControl;
    private Camera charaCam;
    public float mouseNumOne = , mouseNumTwo = ;
    public static bool chufa = false;
    void Awake()
    {
        charaControl = GetComponent<CharacterController>();
        charaCam = MainCamerahead.GetComponent<Camera>();
    }
    void Update()
    {
        aixsX = Input.GetAxis("Horizontal");
        aixsY = Input.GetAxis("Vertical");
        mouseScroll = Input.GetAxis("Mouse ScrollWheel");
        if (Input.GetKey(KeyCode.LeftShift))
        {
            moveSpeed = runMoveSpeed;
        }
        else
        {
            moveSpeed = standardMoveSpeed;
        }
 
        charaControl.SimpleMove(transform.forward * moveSpeed * aixsY * 0.02f + transform.right * moveSpeed * aixsX * 0.02f);
 
        /* ***********************镜头跟随鼠标移动的第一种方法**********************
        float mousex = Input.GetAxis("Mouse X") * 2f;
        float mousey = Input.GetAxis("Mouse Y") * 2f;
        if (mousex > 180)
        {
            mousex = 180;
        }
        else if (mousex < -180)
        {
            mousex = -180;
        }
        if (Mathf.Abs(mousey) < 120f)
        {
            MainCamerahead.transform.localRotation = charaCam.transform.localRotation * Quaternion.Euler(-mousey, 0, 0);
            CapsulePlayer.transform.localRotation = transform.localRotation * Quaternion.Euler(0, mousex, 0);
        }
      */
 
              //镜头跟随鼠标移动的第二种写法    (总之写法有很多,自己用着舒服就行)
          if (chufa )
        {
            mouseNumOne += Input.GetAxis("Mouse Y");
            mouseNumTwo += Input.GetAxis("Mouse X");
            if (mouseNumOne > )
            {
                mouseNumOne = ;
            }
            else if (mouseNumOne < -)
            {
                mouseNumOne = -;
            }
            if (Mathf.Abs(mouseNumOne) < 90f)
            {
                MainCamerahead.transform.Rotate(new Vector3(- * Input.GetAxis("Mouse Y"), , ));
                CapsulePlayer.transform.Rotate(, 1.6f * Input.GetAxis("Mouse X"), );
            }
        }
        else
        {
           //鼠标滑动镜头跟着滑动
            if (Input.GetMouseButton())
            {
                mouseNumOne += Input.GetAxis("Mouse Y");
                mouseNumTwo += Input.GetAxis("Mouse X");
                if (mouseNumOne > )
                {
                    mouseNumOne = ;
                }
                else if (mouseNumOne < -)
                {
                    mouseNumOne = -;
                }
                if (Mathf.Abs(mouseNumOne) < 90f)
                {
                    MainCamerahead.transform.Rotate(new Vector3(- * Input.GetAxis("Mouse Y"), , ));
                    CapsulePlayer.transform.Rotate(, 1.6f * Input.GetAxis("Mouse X"), );
                }
            }
        }
 
        //放大缩小功能
 
        if (charaCam.fieldOfView > )
        {
            charaCam.fieldOfView -= mouseScrolbackSpeed;
        }
        else if (charaCam.fieldOfView < )
        {
            charaCam.fieldOfView += mouseScrolbackSpeed;
        }
        else
        {
            charaCam.fieldOfView -= mouseScroll * mouseScrollSpeed;
        }
    }
}

Demo链接：https://pan.baidu.com/s/1s8At3pMXI94-6Ri14_JvPw
提取码：1cbw

代码写的不好，大家多多包涵。