# Unity 2D 小粉人

## unity簡介
* Unity 是一款由Unity Technologies開發的跨平台遊戲引擎，可用於開發2D和3D遊戲。
* 支援多種個人電腦、行動裝置、遊戲主機、網頁平台、擴增實境和虛擬實境，被認為容易上手，並在獨立遊戲開發中廣受歡迎。
* 許多遊戲，如:傳說對決、碧藍航線、原神，皆用unity製做。
* 遊戲透過製作場景、放置物件、撰寫C#腳本而成。
## 遊戲介紹
#### 2D跑酷遊戲:
一種類型的電子遊戲，通常由玩家控制角色在橫向捲動的場景中不斷奔跑，躲避障礙物並收集物品。這種遊戲注重玩家的反應速度和操作技巧。
#### 遊戲操作:
* 透過左右鍵控制角色左右移動
* 空白鍵進行跳躍
## 遊戲場景
* #### 開始場景
* #### 遊戲關卡一
* #### 遊戲關卡二
* #### 結束畫面

## 物件
* ### 小粉人

* #### 移動
* 左右移動+跑動動畫
* 跳躍+音效+跳躍動畫
* ```csharp=
private SpriteRenderer sprite;
private Animator anim;
private Rigidbody2D rb;
private BoxCollider2D coll;
[SerializeField] private AudioSource jumpSoundEffect;
[SerializeField] private LayerMask jumpableGround;
private float dirX=0f;
[SerializeField] private float moveSpeed = 7f;
[SerializeField] private float jumpForce = 7f;
private enum MovementState { idle,running,jumping,falling}

void Start()
{
rb=GetComponent<Rigidbody2D>();
coll = GetComponent<BoxCollider2D>();
sprite = GetComponent<SpriteRenderer>();
anim = GetComponent<Animator>();

}

// 移動
void Update()
{
dirX=Input.GetAxisRaw("Horizontal");
rb.velocity = new Vector2(dirX*moveSpeed,rb.velocity.y);
if (Input.GetButtonDown("Jump"))
{
jumpSoundEffect.Play();
rb.velocity= new Vector2(rb.velocity.x,jumpForce);
}

UpdateAnimationState();
}
//動畫
private void UpdateAnimationState()
{
MovementState state;
if(dirX > 0f)
{
state = MovementState.running;
sprite.flipX = false;
}
else if(dirX < 0f)
{
state = MovementState.running;
sprite.flipX = true;
}
else
{
state = MovementState.idle;
}

if(rb.velocity.y > .1f)
{
state = MovementState.jumping;
}
else if(rb.velocity.y < -.1f)
{
state = MovementState.falling;
}

anim.SetInteger("state", (int)state);
}

    * #### 收集物品
        * 播放音效
        * 更新計分
        * 刪除櫻桃
        * ```csharp=
            int cherries = GameManger.Instance.score;
            [SerializeField] private Text cherriesText;
            [SerializeField] private AudioSource collectSoundEffect;
            private void OnTriggerEnter2D(Collider2D collision)
            {
                if (collision.gameObject.CompareTag("cherry"))
                {
                    collectSoundEffect.Play();
                    Destroy(collision.gameObject);
                    cherries++;
                    cherriesText.text = "cherries:" + cherries;

                    GameManger.Instance.score = cherries;
                }
            }

* #### 死亡
* 播放音效
* 死亡動畫
* 回到此場景開頭
* ```csharp=
private Rigidbody2D rb;
private Animator anim;
[SerializeField] private AudioSource deathSoundEffect;
// Start is called before the first frame update
private void Start()
{
rb=GetComponent<Rigidbody2D>();
anim=GetComponent<Animator>();
}
private void OnCollisionEnter2D(Collision2D collision)
{
if (collision.gameObject.CompareTag("trap"))
{
deathSoundEffect.Play();
Die();
}
}
private void Die()
{
rb.bodyType = RigidbodyType2D.Static;
anim.SetTrigger("death");
}
private void RestartLevel()
{
SceneManager.LoadScene(SceneManager.GetActiveScene().name);
}

* ### 櫻桃 ![image](https://hackmd.io/_uploads/S1d5b6R80.png)
    * 跳動循環動畫
    * 被觸碰後加分且消失
* ### 陷阱一:地刺![image](https://hackmd.io/_uploads/B1b3Mp0UC.png)
    * 碰到使角色死亡
* ### 陷阱二:旋轉齒輪![image](https://hackmd.io/_uploads/BJLdmaR80.png)
    * 碰到使角色死亡
    * 在固定的兩點間移動且旋轉
    * ```csharp=
      [SerializeField] private float speed = 2f;
      //設定齒輪旋轉速度
      private void Update()
      {
          transform.Rotate(0,0,360*speed*Time.deltaTime);
      }

* ### 移動地板
* 角色可站在上面移動
* 在固定的兩點間移動
* ```csharp=
[SerializeField] private GameObject[] waypoints;
private int currentWaypointIndex = 0;
[SerializeField] private float speed = 2f;//設定移動速度

private void Update()
{//在兩點間移動
if (Vector2.Distance(waypoints[currentWaypointIndex].transform.position , transform.position) < .1f)
{
currentWaypointIndex++;
if(currentWaypointIndex >= waypoints.Length)
{
currentWaypointIndex = 0;
}
}
transform.position = Vector2.MoveTowards(transform.position, waypoints[currentWaypointIndex].transform.position, Time.deltaTime * speed);
}

* ### 最終旗子![image](https://hackmd.io/_uploads/HJZ-E6RUR.png)
    * 角色碰到進入下一個場景且撥放音效
    * ```csharp=
        private AudioSource finishSound;
        private bool levelCompleted = false;
        
        private void Start()
        {//設定音效
            finishSound = GetComponent<AudioSource>();
        }
        private void OnTriggerEnter2D(Collider2D collision)
        {//判斷觸碰
            if(collision.gameObject.name == "player" && !levelCompleted)
            {
                finishSound.Play();
                levelCompleted = true;
                Invoke("CompleteLevel", 2f);
            }
        }
        private void CompleteLevel()
        {//改變場景
            SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex +1);
        }