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

public class CameraTrun : MonoBehaviour
{
    // 水平视角移动的敏感度
    public float sensitivityHor = 3f;
    // 垂直视角移动的敏感度
    public float sensitivityVer = 3f;
    // 视角向上移动的角度范围，该值越小范围越大
    public float upVer = -40;
    // 视角向下移动的角度范围，该值越大范围越大
    public float downVer = 45;
    // 垂直旋转角度
    private float rotVer;
    //水平旋转角度
    private float rotHor;
    bool isRot;//APP是否旋转
    int CurNum;//当前变化的数值

    public static CameraTrun _instance;
    // 旋转的方向问题
    // x 表示绕 x 轴旋转，即 前上后 的角度
    // y 表示绕 y 轴旋转，即 左前后 的角度
    // y 表示绕 y 轴旋转，即 左前后 的角度
    private void Awake()
    {
        _instance = this;
    }
    // Start is called before the first frame update
    void Start()
    {
        // 初始化当前的垂直角度
        rotVer = transform.eulerAngles.x;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButton(1) || isRot)
        {
            // 获取鼠标上下的移动位置
            float mouseVer = 0;
            // 获取鼠标左右的移动位置
            float mouseHor = 0;
            if (isRot)
            {

                switch (CurNum)
                {
                    case 1:
                        mouseVer += 0.05f;
                        break;
                    case 2:
                        mouseVer -= 0.05f;
                        break;
                    case 3:
                        mouseHor -= 0.05f;
                        break;
                    case 4:
                        mouseHor += 0.05f;
                        break;
                }

            }
            else
            {
                mouseVer = Input.GetAxis("Mouse Y");
                mouseHor = Input.GetAxis("Mouse X"); 
            } 

            // 鼠标往上移动，视角其实是往下移，所以要想达到视角也往上移的话，就要减去它
            rotVer -= mouseVer * sensitivityVer;

            // 限定上下移动的视角范围，即垂直方向不能360度旋转
            rotVer = Mathf.Clamp(rotVer, upVer, downVer);

            // 水平移动
            float rotHor = transform.localEulerAngles.y + mouseHor * sensitivityHor;
            // 设置视角的移动值
             // transform.localEulerAngles = new Vector3(rotVer, rotHor, 0);
            //  transform.parent.localEulerAngles = new Vector3(rotVer, rotHor, 0); 
            transform.localEulerAngles = new Vector3(transform.localEulerAngles.x - mouseVer * transform.parent.GetComponent<Move>().moveSpeed, transform.localEulerAngles.y + mouseHor * transform.parent.GetComponent<Move>().moveSpeed, 0);
            //   transform.parent.Translate(transform.up * -rotVer * transform.parent.GetComponent<Move>().moveSpeed * 0.1f + transform.right * -rotHor * transform.parent.GetComponent<Move>().moveSpeed * 0.1f, Space.World);
        }
    }
    public void ChangeCamera(int num,bool state) {
        isRot = state;
        CurNum = num;
    
    }
}