Unity实现主角移动与摄像机跟随

float h = Input.GetAxis("Horizontal");//对应键盘的上下
float v = Input.GetAxis("Vertical");//对应键盘的左右

void Update()
{
 role.SetBool(StealthConst.SNEAK, Input.GetKey(KeyCode.LeftShift));
 float h = Input.GetAxis("Horizontal");
 float v = Input.GetAxis("Vertical");
 if (Mathf.Abs(h) > 0.1f || Mathf.Abs(v) > 0.1f)
 {
 //5.6由动画控制器中的参数决定
 float currentSpeed = Mathf.Lerp(role.GetFloat(StealthConst.SPEED), 5.6f, moveSpeed * Time.deltaTime);
 role.SetFloat(StealthConst.SPEED, currentSpeed);//Animator通过速度控制移动的快慢
 Vector3 targetDir = new Vector3(h, 0, v);
 //Vector3.up相当于（0，1，0）绕着Y轴，看向目标位置
 Quaternion newRotation = Quaternion.LookRotation(targetDir, Vector3.up);
 transform.rotation = Quaternion.Lerp(transform.rotation, newRotation, rotateSpeed * Time.deltaTime);
 }
 else
 {
 role.SetFloat(StealthConst.SPEED, 0);
 }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FollowPlayer : MonoBehaviour
{
 private Vector3 offset;
 public Transform role;
 public float moveSpeed = 3;
 public float rotateSpeed = 3;
 
 // Start is called before the first frame update
 void Start()
 {
 offset = transform.position - role.position;
 offset = new Vector3(0, offset.y, offset.z);
 }

 // Update is called once per frame
 void Update()
 {
 Vector3 beginPos = role.position + offset;//摄像机正常偏移位置，起点
 Vector3 endPos = role.position + offset.magnitude * Vector3.up;//offset.magnitude向量的长度
 ///从起点到终点分别取3个点，通过射线判断摄像机是否有遮挡
 Vector3[] posArr = new Vector3[] {
  beginPos,
  Vector3.Lerp(beginPos,endPos,0.25f),
  Vector3.Lerp(beginPos,endPos,0.5f),
  Vector3.Lerp(beginPos,endPos,0.75f),
  endPos
 };
 Vector3 targetPos = posArr[0];
 foreach (var pos in posArr)
 {
  RaycastHit hitInfo;
  ///第一个参数射线的起点，第二个参数射线的方向
  if (Physics.Raycast(pos, role.position - pos, out hitInfo))
  {
  if (hitInfo.collider.tag == StealthConst.PLAYER)
  {
   targetPos = pos;
   break;
  }
  else
  {
   continue;
  }
  }
  else
  {
  targetPos = pos;
  break;
  }
 }
 this.transform.position = Vector3.Lerp(transform.position,targetPos,Time.deltaTime*moveSpeed);//通过插值平滑移动
 Quaternion nowRotation = transform.rotation;
 this.transform.LookAt(role.position);//摄像机转向目标
 this.transform.rotation = Quaternion.Lerp(nowRotation, transform.rotation, Time.deltaTime * rotateSpeed);//通过插曲平滑旋转
 }
}