Unity初级案例 - 吃豆人（Unity2017.2.0）Day 2

╰半夏微凉° 2022-04-05 14:29 253阅读 0赞

1.用代码控制动画状态机及设置渲染顺序

//获取移动方向
                Vector2 dir = dest - (Vector2)transform.position;
                //把获取到的移动方向设置给动画状态机
                anim.SetFloat("DirX", dir.x);
                anim.SetFloat("DirY", dir.y);

2.为迷宫加入可以被吃掉的豆点

创建豆点Pacdot，添加碰撞体，并且添加Pacdot脚本

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class Pacdot : MonoBehaviour
    {
        private void OnTriggerEnter2D(Collider2D collision)
        {
            if(collision.gameObject.name == "Pacman")
            {
                Destroy(gameObject);
            }
        }
    }

运行程序，结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70][]

3.创建四个敌人并采用重写状态机控制动画

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 1][]

4.用现有的知识模拟AI的思路讲解

使用A\*寻路和感知系统来完成鬼的寻路。

5.让鬼可以按照单条路径巡逻

首先添加路径点

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 2][]

然后给鬼添加GhostMove脚本，让它移动

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class GhostMove : MonoBehaviour
    {
        //储存所有路径点的Transform组件
        public Transform[] wayPoints;
        public float speed = 0.2f;
        //当前在前往哪个路径点的途中
        private int index = 0;
        private Animator anim;
    
        private void Awake()
        {
            anim = GetComponent<Animator>();
        }
    
        private void FixedUpdate()
        {
            if (transform.position != wayPoints[index].position)
            {
                Vector2 temp = Vector2.MoveTowards(transform.position, wayPoints[index].position, speed);
                GetComponent<Rigidbody2D>().MovePosition(temp);
            }
            else
            {
                index = (index + 1) % wayPoints.Length;
            }
            Vector2 dir = (Vector2)wayPoints[index].position - (Vector2)transform.position;
            anim.SetFloat("DirX", dir.x);
            anim.SetFloat("DirY", dir.y);
        }
    
        private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.gameObject.name == "Pacman")
            {
                Destroy(collision.gameObject);
            }
        }
    }

运行程序，结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 3][]

6.改进巡逻系统使鬼可以随机选择一条路径巡逻

重新编写巡逻系统

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class GhostMove : MonoBehaviour
    {
        public GameObject[] wayPointsGos;
        public float speed = 0.2f;
        //当前在前往哪个路径点的途中
        private int index = 0;
        private Animator anim;
        private List<Vector3> wayPoints = new List<Vector3>();
    
        private void Awake()
        {
            anim = GetComponent<Animator>();
        }
    
        private void Start()
        {
            LoadAPath(wayPointsGos[Random.Range(0, 2)]);
        }
    
        private void FixedUpdate()
        {
            if (transform.position != wayPoints[index])
            {
                Vector2 temp = Vector2.MoveTowards(transform.position, wayPoints[index], speed);
                GetComponent<Rigidbody2D>().MovePosition(temp);
            }
            else
            {
                index++;
                if(index >= wayPoints.Count)
                {
                    index = 0;
                    LoadAPath(wayPointsGos[Random.Range(0, 2)]);
                }
            }
            Vector2 dir = (Vector2)wayPoints[index] - (Vector2)transform.position;
            anim.SetFloat("DirX", dir.x);
            anim.SetFloat("DirY", dir.y);
        }
    
        private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.gameObject.name == "Pacman")
            {
                Destroy(collision.gameObject);
            }
        }
    
        private void LoadAPath(GameObject go)
        {
            wayPoints.Clear();
            foreach (Transform t in go.transform)
            {
                wayPoints.Add(t.position);
            }
        }
    }

运行程序结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 4][]

7.完善用巡逻来模拟AI的逻辑

添加GameManager脚本，让鬼的初始路径各不相同

using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class GhostMove : MonoBehaviour
    {
        public GameObject[] wayPointsGos;
        public float speed = 0.2f;
        //当前在前往哪个路径点的途中
        private int index = 0;
        private Animator anim;
        private List<Vector3> wayPoints = new List<Vector3>();
        private Vector3 startPos;
    
        private void Awake()
        {
            anim = GetComponent<Animator>();
        }
    
        private void Start()
        {
            startPos = transform.position + new Vector3(0, 3, 0);
            //初始化路径
            LoadAPath(wayPointsGos[GameManager._instance.usingIndex[GetComponent<SpriteRenderer>().sortingOrder - 2]]);
        }
    
        private void FixedUpdate()
        {
            if (transform.position != wayPoints[index])
            {
                Vector2 temp = Vector2.MoveTowards(transform.position, wayPoints[index], speed);
                GetComponent<Rigidbody2D>().MovePosition(temp);
            }
            else
            {
                index++;
                if(index >= wayPoints.Count)
                {
                    index = 0;
                    LoadAPath(wayPointsGos[Random.Range(0, wayPointsGos.Length)]);
                }
            }
            Vector2 dir = (Vector2)wayPoints[index] - (Vector2)transform.position;
            anim.SetFloat("DirX", dir.x);
            anim.SetFloat("DirY", dir.y);
        }
    
        private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.gameObject.name == "Pacman")
            {
                Destroy(collision.gameObject);
            }
        }
    
        private void LoadAPath(GameObject go)
        {
            wayPoints.Clear();
            foreach (Transform t in go.transform)
            {
                wayPoints.Add(t.position);
            }
            wayPoints.Insert(0, startPos);
            wayPoints.Add(startPos);
        }
    }

然后在GhostMove中初始化路径

//初始化路径
            LoadAPath(wayPointsGos[GameManager._instance.usingIndex[GetComponent<SpriteRenderer>().sortingOrder - 2]]);

运行程序结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 5][]

8.引入超级豆点奖励道具

在GameManager中添加生成超级豆点的代码

private void CreateSuperPacdot()
        {
            int tempIndex = Random.Range(0, pacdotGos.Count);
            pacdotGos[tempIndex].transform.localScale = new Vector3(3, 3, 3);
            pacdotGos[tempIndex].GetComponent<Pacdot>().isSuperPacdot = true;
        }

在Pacdot中添加吃豆人碰到超级豆点的方法

private void OnTriggerEnter2D(Collider2D collision)
        {
            if(collision.gameObject.name == "Pacman")
            {
                if (isSuperPacdot)
                {
                    //TODO
                    //告诉GameManager我是超级豆子而且还被吃了
                    //让吃豆人变成超级吃豆人，可以吃鬼
                }
                Destroy(gameObject);
            }
        }

在GhostMove中添加吃了超级豆点的吃豆人碰到鬼的方法

private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.gameObject.name == "Pacman")
            {
                if (GameManager._instance.isSuperPacman)
                {
                    //TODO
                    //真倒霉，碰到了超级吃豆人，我要回家躲躲
                }
                Destroy(collision.gameObject);
            }
        }

9.完善超级豆点的功能

在GameManager中添加有关超级豆的一些代码

private void Start()
        {
            Invoke("CreateSuperPacdot", 10f);
        }
    
        public void OnEatPacdot(GameObject go)
        {
            pacdotGos.Remove(go);
        }
    
        public void OnEatSuperPacdot()
        {
            Invoke("CreateSuperPacdot", 10f);
            isSuperPacman = true;
            FreezeEnemy();
            StartCoroutine("RecoverEnemy");
        }
    
        IEnumerator RecoverEnemy()
        {
            yield return new WaitForSeconds(3f);
            DisFreezeEnemy();
            isSuperPacman = false;
        }
    
        private void CreateSuperPacdot()
        {
            int tempIndex = Random.Range(0, pacdotGos.Count);
            pacdotGos[tempIndex].transform.localScale = new Vector3(3, 3, 3);
            pacdotGos[tempIndex].GetComponent<Pacdot>().isSuperPacdot = true;
        }
    
        private void FreezeEnemy()
        {
            binky.GetComponent<GhostMove>().enabled = false;
            clyde.GetComponent<GhostMove>().enabled = false;
            inky.GetComponent<GhostMove>().enabled = false;
            pinky.GetComponent<GhostMove>().enabled = false;
            binky.GetComponent<SpriteRenderer>().color = new Color(0.7f, 0.7f, 0.7f, 0.7f);
            clyde.GetComponent<SpriteRenderer>().color = new Color(0.7f, 0.7f, 0.7f, 0.7f);
            inky.GetComponent<SpriteRenderer>().color = new Color(0.7f, 0.7f, 0.7f, 0.7f);        
            pinky.GetComponent<SpriteRenderer>().color = new Color(0.7f, 0.7f, 0.7f, 0.7f);
        }
    
        private void DisFreezeEnemy()
        {
            binky.GetComponent<GhostMove>().enabled = true;
            clyde.GetComponent<GhostMove>().enabled = true;
            inky.GetComponent<GhostMove>().enabled = true;
            pinky.GetComponent<GhostMove>().enabled = true;
            binky.GetComponent<SpriteRenderer>().color = new Color(1, 1, 1, 1);
            clyde.GetComponent<SpriteRenderer>().color = new Color(1, 1, 1, 1);
            inky.GetComponent<SpriteRenderer>().color = new Color(1, 1, 1, 1);
            pinky.GetComponent<SpriteRenderer>().color = new Color(1, 1, 1, 1);
        }

在 Pacdot中修改碰撞代码

private void OnTriggerEnter2D(Collider2D collision)
        {
            if(collision.gameObject.name == "Pacman")
            {
                if (isSuperPacdot)
                {
                    GameManager._instance.OnEatPacdot(gameObject);
                    GameManager._instance.OnEatSuperPacdot();
                    Destroy(gameObject);
                }
                else
                {
                    GameManager._instance.OnEatPacdot(gameObject);
                    Destroy(gameObject);
                }
            }
        }

在 GhostMove中修改碰撞代码

运行程序，结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 6][]

10.设计UI界面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 7][]

11.处理准备时的倒计时动画

在GameManager中添加游戏逻辑处理

public GameObject startpanel;
        public GameObject gamePanel;
        public GameObject startCountDonwPrefab;
        public GameObject gameoverPrefab;
        public GameObject winPrefab;
        public AudioClip startClip;
        private void Start()
        {
            SetGameState(false);   
        }
    
        public void OnStartButton()
        {
            StartCoroutine(PlayerStartCountDown());
            AudioSource.PlayClipAtPoint(startClip, Vector3.zero);
            startpanel.SetActive(false);
        }
    
        public void OnExitButton()
        {
            Application.Quit();
        }
    
        IEnumerator  PlayerStartCountDown()
        {
            GameObject go = Instantiate(startCountDonwPrefab);
            yield return new WaitForSeconds(4f);
            Destroy(go);
            SetGameState(true);
            Invoke("CreateSuperPacdot", 10f);
            gamePanel.SetActive(true);
            GetComponent<AudioSource>().Play();
        }
    
        public void OnEatPacdot(GameObject go)
        {
            pacdotGos.Remove(go);
        }
    
        public void OnEatSuperPacdot()
        {
            Invoke("CreateSuperPacdot", 10f);
            isSuperPacman = true;
            FreezeEnemy();
            StartCoroutine("RecoverEnemy");
        }
        private void SetGameState(bool state)
        {
            pacman.GetComponent<PacmanMove>().enabled = state;
            binky.GetComponent<GhostMove>().enabled = state;
            clyde.GetComponent<GhostMove>().enabled = state;
            inky.GetComponent<GhostMove>().enabled = state;
            pinky.GetComponent<GhostMove>().enabled = state;
        }

12.UI逻辑的完善与计分面板的显示

private int pacdotNum = 0;
        private int nowEat = 0;
        public int score = 0;
        //更新显示
        private void Update()
        {
            if(nowEat == pacdotNum && pacman.GetComponent<PacmanMove>().enabled != false)
            {
                gamePanel.SetActive(false);
                Instantiate(winPrefab);
                StopAllCoroutines();
                SetGameState(false);
            }
            if(nowEat == pacdotNum)
            {
                if (Input.anyKeyDown)
                {
                    SceneManager.LoadScene(0);
                }
            }
            if (gamePanel.activeInHierarchy)
            {
                remainText.text = "Remain:\n\n" + (pacdotNum - nowEat);
                nowText.text = "Eaten:\n\n" + nowEat;
                remainText.text = "Remain:\n\n" + score;
            }
        }

在合适的地方对三个参数进行添加

![20181214164250365.png][]![20181214164258493.png][]

在GhostMove中完善游戏结束的代码

private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.gameObject.name == "Pacman")
            {
                if (GameManager._instance.isSuperPacman)
                {
                    transform.position = startPos - new Vector3(0, 3, 0);
                    index = 0;
                    GameManager._instance.score += 500;
                }
                else
                {
                    collision.gameObject.SetActive(false);
                    GameManager._instance.gamePanel.SetActive(false);
                    Instantiate(GameManager._instance.gameoverPrefab);
                    Invoke("ReStart", 3f);
                }      
            }
        }
        private void ReStart()
        {
            SceneManager.LoadScene(0);
        }

运行程序结果如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 9][]

13.发布游戏

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70]: /images/20220405/35ba18f3fea24feaac60486977c4cdf8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 1]: /images/20220405/f0833cfc23fc4673bfd6bd60546ddbec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 2]: /images/20220405/a0c29230d77e477ca789738632c97b55.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 3]: /images/20220405/24cd135b312a42b989840d0204dfae9a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 4]: /images/20220405/47444286894743f7a186b4386207c9d2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 5]: /images/20220405/95a9c6cbcb2944d78c04469c1d1c4593.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 6]: /images/20220405/68346301aaf141048534ef0921aeab5d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 7]: /images/20220405/b341f19923c84d4c97036d6420b1d074.png
[20181214164250365.png]: https://img-blog.csdnimg.cn/20181214164250365.png
[20181214164258493.png]: /images/20220405/722c4b7fbed94d06a3b860567ad4a4b6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 8]: /images/20220405/5a51a9f46d564b39a13c8c3c6b7fb293.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2tvdXpodWFuamluZzE4NDk_size_16_color_FFFFFF_t_70 9]: /images/20220405/7ffc572e9e584d228581af938c30a94c.png