相机跟随

一、设置为子物体

让相机成为角色的子物体，跟随角色位置变化

不灵活

二、脚本控制

脚本挂在相机上

简单移动

     // Use this for initialization
     void Start () {
         _offsetPos = transform.position - Target.transform.position;
     }
     
     // 控制相机跟随
    void follow()
    {
        transform.position = Target.transform.position + _offsetPos;
    }

视野缩放

    // 控制相机缩放
    void scroll()
    {
        _distance = _offsetPos.magnitude;
        if (Input.GetKey(KeyCode.Q))
        {
            _distance -= ScrollSpeed;
        }
        if (Input.GetKey(KeyCode.E))
        {
            _distance += ScrollSpeed;
        }
        _distance = Mathf.Clamp(_distance, MinDistance, MaxDistance);
        _offsetPos = _offsetPos.normalized * _distance;
        transform.position = Target.transform.position + _offsetPos;
    }

视野旋转

     // 控制相机旋转
    void rotate()
    {
        if (Input.GetMouseButtonDown(0)) // 鼠标左键
        {
            _isRotate = true;
        }
        else if (Input.GetMouseButtonUp(0))
        {
            _isRotate = false;
        }

        if (_isRotate)
        {
            Vector3 originPos = transform.position;
            Quaternion originRotate = transform.rotation;
            transform.RotateAround(Target.transform.position, Target.transform.up, RotateSpeed * Input.GetAxis("Mouse X"));
            transform.RotateAround(Target.transform.position, transform.right, -RotateSpeed * Input.GetAxis("Mouse Y"));

            float x = transform.eulerAngles.x;

            if(x<10 || x > 80)
            {
                transform.position = originPos;
                transform.rotation = originRotate;
            }
        }

        _offsetPos = transform.position - Target.transform.position;
        transform.position = Target.transform.position + _offsetPos;
    }

完整脚本

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

public class Camera : MonoBehaviour
{

    public GameObject Target;
    public float RotateSpeed;
    public float ScrollSpeed;
    public float MinDistance, MaxDistance;

    bool _isRotate;         // 是否正在旋转
    Vector3 _offsetPos;     // 距 Target 的偏移量
    float _distance;        // 缩放距离

    // Start is called before the first frame update
    void Start()
    {
        RotateSpeed = 10;
        ScrollSpeed = 1;
        MinDistance = 2;
        MaxDistance = 50;
        _offsetPos = transform.position - Target.transform.position;
    }

    // Update is called once per frame
    void Update()
    {
        //follow();
        scroll();
        rotate();
    }

    // 控制相机跟随
    void follow()
    {
        transform.position = Target.transform.position + _offsetPos;
    }

    // 控制相机缩放
    void scroll()
    {
        _distance = _offsetPos.magnitude;
        if (Input.GetKey(KeyCode.Q))
        {
            _distance -= ScrollSpeed;
        }
        if (Input.GetKey(KeyCode.E))
        {
            _distance += ScrollSpeed;
        }
        _distance = Mathf.Clamp(_distance, MinDistance, MaxDistance);
        _offsetPos = _offsetPos.normalized * _distance;
        transform.position = Target.transform.position + _offsetPos;
    }

    // 控制相机旋转
    void rotate()
    {
        if (Input.GetMouseButtonDown(0))    // 鼠标左键
        {
            _isRotate = true;
        }
        else if (Input.GetMouseButtonUp(0))
        {
            _isRotate = false;
        }

        if (_isRotate)
        {
            Vector3 originPos = transform.position;
            Quaternion originRotate = transform.rotation;
            transform.RotateAround(Target.transform.position, Target.transform.up, RotateSpeed * Input.GetAxis("Mouse X"));
            transform.RotateAround(Target.transform.position, transform.right, -RotateSpeed * Input.GetAxis("Mouse Y"));

            float x = transform.eulerAngles.x;

            if(x<10 || x > 80)
            {
                transform.position = originPos;
                transform.rotation = originRotate;
            }
        }

        _offsetPos = transform.position - Target.transform.position;
        transform.position = Target.transform.position + _offsetPos;
    }
}

Cinemachine插件

极好的相机跟随插件

通过上方的 cinemachine 工具栏创建一个 cinemachine相机，为相机添加cinamachine brain组件，挂载创建的虚拟相机

黄点是目标点，可以通过属性 body-tracked object offset 来修改