using DG.Tweening;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// 相机环绕
/// </summary>
public class MyCameraRoate : MonoBehaviour
{
    Vector3 center;
    float speed;
    float radius;
    float high;
    Transform cameraobj;
    private void Update()
    {
        if(cameraobj != null)
        {
            cameraobj.RotateAround(center, Vector3.up, Time.deltaTime*speed);
            cameraobj.LookAt(center);
        }
    }

    public void StartRoate(Camera camera,Vector3 center,float radius,float speed,float high)
    {
        this.center = center;
        this.radius = radius;
        this.speed = speed;
        this.high = high;

        //记录当前位置
        Vector3 currentPostion= camera.transform.position;
        camera.transform.position = center;
        camera.transform.LookAt(new Vector3(currentPostion.x, center.y, currentPostion.z));
        camera.transform.Translate(Vector3.forward * radius+new Vector3(0,high,0), Space.Self);
        Vector3 startpoint = camera.transform.position;

        //还原
        camera.transform.position = currentPostion;
        camera.transform.DOMove(startpoint, 2).OnComplete( ()=> 
        {
            camera.transform.DOLookAt(center, 1).OnComplete(() => 
            {
                cameraobj = camera.transform;
            });
        });
    }

    public void EndRoate()
    {
        cameraobj.DOKill();
        cameraobj = null;
    }
}