using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;//別忘了引用

//卡牌狀態(tài)，正面、背面
public enum CardState
{
 Front,
 Back
}
public class CardTurnOver : MonoBehaviour{
 public GameObject mFront;//卡牌正面
 public GameObject mBack;//卡牌背面
 public CardState mCardState = CardState.Front;//卡牌當(dāng)前的狀態(tài)，是正面還是背面？
 public float mTime = 0.3f;
 private bool isActive = false;//true代表正在執(zhí)行翻轉(zhuǎn)，不許被打斷

 /// <summary>
 /// 初始化卡牌角度，根據(jù)mCardState
 /// </summary>
 public void Init()
 {
  if(mCardState==CardState.Front)
  {
   //如果是從正面開始，則將背面旋轉(zhuǎn)90度，這樣就看不見背面了
   mFront.transform.eulerAngles = Vector3.zero;
   mBack.transform.eulerAngles = new Vector3(0, 90, 0);
  }
  else
  {
   //從背面開始，同理
   mFront.transform.eulerAngles = new Vector3(0, 90, 0);
   mBack.transform.eulerAngles = Vector3.zero;
  }
 }
 private void Start()
 {
  Init();
 }

 /// <summary>
 /// 留給外界調(diào)用的接口
 /// </summary>
 public void StartBack()
 {
  if (isActive)
   return;
  StartCoroutine(ToBack());
 }
 /// <summary>
 /// 留給外界調(diào)用的接口
 /// </summary>
 public void StartFront()
 {
  if (isActive)
   return;
  StartCoroutine(ToFront());
 }
 /// <summary>
 /// 翻轉(zhuǎn)到背面
 /// </summary>
 IEnumerator ToBack()
 {
  isActive = true;
  mFront.transform.DORotate(new Vector3(0, 90, 0), mTime);
  for (float i = mTime; i >= 0; i -= Time.deltaTime)
   yield return 0;
  mBack.transform.DORotate(new Vector3(0, 0, 0), mTime);
  isActive = false;

 }
 /// <summary>
 /// 翻轉(zhuǎn)到正面
 /// </summary>
 IEnumerator ToFront()
 {
  isActive = true;
  mBack.transform.DORotate(new Vector3(0, 90, 0), mTime);
  for (float i = mTime; i >= 0; i -= Time.deltaTime)
   yield return 0;
  mFront.transform.DORotate(new Vector3(0, 0, 0), mTime);
  isActive = false;
 }
}