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


//鼠标点击拖拽旋转

public class MouseOnClickRotate : MonoBehaviour
{

    public GameObject tarGetObj;//拖拽需要旋转的物体
    [Range(5, 50)] public float rotateSpeed = 150f;//旋转速度
    private Vector3 lastPosition;//纪录鼠标位置


    private void Update()
    {

        if (Input.GetMouseButtonDown(0))
        {
            lastPosition = Input.mousePosition;
            //鼠标上一帧位置
        }

        else if (Input.GetMouseButton(0))
        {

            Vector3 nowPosition = Input.mousePosition;
            //鼠标当前位置
            Vector3 posDelta = lastPosition - nowPosition;
            //位置差
            lastPosition = nowPosition;
            //并更新上一帧位置
        Quaternion rot = Quaternion.Euler(posDelta.y * rotateSpeed * Time.deltaTime, 
             posDelta.x * rotateSpeed * Time.deltaTime, 0);
            //角度增加的量
            tarGetObj.transform.rotation = rot* transform.rotation;
            //旋转（位置更新）
        }
    }
}