效果展示

第一步

在人物模型添加一个空的子物体，作为相机的跟随点，位置大概在胸口。

第二步

添加一个虚拟相机

虚拟相机配置如下

注意Follow的物体就是刚刚设置的空物体

第三步

在人物模型上添加PlayerInput组件

Action文件配置如下

第四步

创建NeirInputs和NeirController脚本并挂载到人物模型上

NeirInputs负责玩家输入

NeirController负责根据输入的值旋转相机

脚本如下

NeirInputs

using UnityEngine;#if ENABLE_INPUT_SYSTEM && STARTER_ASSETS_PACKAGES_CHECKEDusing UnityEngine.InputSystem;#endifpublic class NeirInputs : MonoBehaviour{[Header("角色输入值")]public Vector2 look;#if !UNITY_IOS || !UNITY_ANDROIDpublic bool cursorLocked = true;public bool cursorInputForLook = true;#endif#if ENABLE_INPUT_SYSTEM && STARTER_ASSETS_PACKAGES_CHECKEDpublic void OnLook(InputValue value){if (cursorInputForLook){LookInput(value.Get<Vector2>());}}#else// old input sys if we do decide to have it (most likely wont)...#endifpublic void LookInput(Vector2 newLookDirection){look = newLookDirection;}#if !UNITY_IOS || !UNITY_ANDROIDprivate void OnApplicationFocus(bool focus){SetCursorState(cursorLocked);}private void SetCursorState(bool newState){Cursor.lockState = newState ? CursorLockMode.Locked : CursorLockMode.None;}#endif}

NeirController

using System.Collections;using System.Collections.Generic;using UnityEngine;[RequireComponent(typeof(CharacterController))]public class NeirController : MonoBehaviour{[Header("虚拟相机")][Tooltip("")]public GameObject CinemachineCameraTarget;[Tooltip("")]public float TopClamp = 70.0f;[Tooltip("")]public float BottomClamp = -30.0f;[Tooltip("")]public float CameraAngleOverrride = 0.0f;[Tooltip("")]public bool LockCAmeraPosition = false;//cinemachineprivate float _cinemachineTargetYaw;private float _cinemachineTargetPitch;private NeirInputs _input;private GameObject _mainCamera;private const float _threshold = 0.01f;private void Awake(){if(_mainCamera == null){_mainCamera = GameObject.FindGameObjectWithTag("MainCamera");}}private void Start(){_input = GetComponent<NeirInputs>();}private void LateUpdate(){CameraRotation();}private void CameraRotation(){if(_input.look.sqrMagnitude >= _threshold && !LockCAmeraPosition){_cinemachineTargetYaw += _input.look.x * Time.deltaTime;_cinemachineTargetPitch += _input.look.y * Time.deltaTime;}_cinemachineTargetYaw = ClampAngle(_cinemachineTargetYaw, float.MinValue, float.MaxValue);_cinemachineTargetPitch = ClampAngle(_cinemachineTargetPitch, BottomClamp, TopClamp);CinemachineCameraTarget.transform.rotation = Quaternion.Euler(_cinemachineTargetPitch + CameraAngleOverrride, _cinemachineTargetYaw, 0.0f);}private static float ClampAngle(float lfAngle, float lfMin, float lfMax){if (lfAngle < -360f) lfAngle += 360f;if (lfAngle > 360f) lfAngle -= 360f;return Mathf.Clamp(lfAngle, lfMin, lfMax);}}