【Unity】摄像机跟随鼠标移动以物体为中心旋转 物体根据视线方向移动

描述

实现摄像机根据鼠标移动跟随物体旋转，以摄像机前物体为中心，摄像机围绕物体旋转，并使摄像机时刻指向物体

实现效果

Unity 组件设置

Camera 组件设置

Body 组件设置

实现代码

CameraRotateMove.cs 摄像机跟随和旋转

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

public class CameraMoveRotate : MonoBehaviour
{
    
    
    public float LerpPar;
    public Transform FollowTrans;
    public Vector3 Offset;
    public Transform CameraTransform1;
    Vector3 ForwardDirec;

    // Start is called before the first frame update
    void Start()
    {
    
    
        Offset = transform.position - FollowTrans.position;
    }

    // Update is called once per frame
    void Update()
    {
    
    
        float dx = Input.GetAxis("Mouse X");

        Offset = Quaternion.AngleAxis(dx * 10, Vector3.up) * Offset;
        transform.position = Vector3.Lerp(transform.position, (FollowTrans.position + Offset), LerpPar * Time.deltaTime);
        transform.rotation = Quaternion.LookRotation(-1 * Offset);


    }
}

move_better.cs 物体根据按键移动

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

public class move_better : MonoBehaviour
{
    
    
    public float speed = 3.0f;
    private Rigidbody mRigidbody;
    public Transform FollowTrans;
    public Vector3 Offset;
    public Transform CameraTrans;
    float Offset_x, Offset_z;
    // Start is called before the first frame update
    void Start()
    {
    
    
        mRigidbody = GetComponent<Rigidbody>();
        Offset = FollowTrans.position - CameraTrans.position;

    }

    // Update is called once per frame
    void Update()
    {
    
    
        Offset = FollowTrans.position - CameraTrans.position;
        Vector3 direction_forward = new Vector3(0, 0, Offset_z);
        Vector3 direction_left = new Vector3(Offset_x, 0, 0);


        if (Input.GetKeyDown("w"))
        {
    
    
            mRigidbody.velocity = CameraTrans.forward * speed;
        }

        if (Input.GetKeyDown("s"))
        {
    
    
            mRigidbody.velocity = -1 * CameraTrans.forward * speed;
        }
        if (Input.GetKeyDown("a"))
        {
    
    
            mRigidbody.velocity = -1 * CameraTrans.right * speed;
        }
        if (Input.GetKeyDown("d"))
        {
    
    
            mRigidbody.velocity = CameraTrans.right * speed;
        }
        if (Input.GetKeyDown("space"))
        {
    
    
            mRigidbody.velocity = 2 * Vector3.up * speed;
        }
    }
}