贪食蛇加强版 (作业十)

作者:

作业需求

前置作业

请先完成上课的贪食蛇：贪食蛇

素材下载

select04下载

STARTO!

先将开头的音效档案放到 Assets 底下

将 Head 物件新增元件 > 音讯 > 音讯源，并将 AudioClip 选择为刚刚新增的音效

并且将 “唤醒时播放” 取消打勾

在阶层视窗按下滑鼠右键 > UI > 文字

修改 Canvas 物件的属性，渲染模式为萤幕空间 – 摄影机，将渲染摄影机改为 MainCamera

修改 Text 物件的属性，颜色为白色，大小30，水平与垂直溢出改为 Overflow，文字改成”请开始游戏”

画面完成

再次新增一个 Text (阶层视窗滑鼠右键 > UI > 文字)

将第二次新增的 Text 更名为 “Score_Display”

修改 Score_Display 物件的属性，文字颜色白色，大小 35，水平垂直溢出设定为 Overflow

文字设定为 “Game Over 换行 please press ‘R’ to try again!”

将物件移动到画面中央位置

画面完成

修改 Snake.cs 脚本为以下程式码

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;

public class Snake : MonoBehaviour
{
    // Start is called before the first frame update
    bool ate = false;
    bool isDied = false;
    public GameObject tailPrefab;
    Vector2 dir = Vector2.right;
    List<Transform> tail = new List<Transform>();
    private Text Score_display;
    private int Score;
    private GameObject gameover_text;
    void Start()
    {
        InvokeRepeating("Move", 0.1f, 0.1f);
        Score_display = GameObject.Find("Text").GetComponent<Text>();
        gameover_text = GameObject.Find("Score_Display").GetComponent<Transform>().gameObject;
        gameover_text.SetActive(false);
    }

    // Update is called once per frame
    void Update()
    {
        if (!isDied)
        {
            if (Input.GetKey(KeyCode.RightArrow))
                dir = Vector2.right;
            else if (Input.GetKey(KeyCode.DownArrow))
                dir = -Vector2.up;
            else if (Input.GetKey(KeyCode.LeftArrow))
                dir = -Vector2.right;
            else if (Input.GetKey(KeyCode.UpArrow))
                dir = Vector2.up;
        }
        else
        {
            if (Input.GetKey(KeyCode.R))
            {
                for (int i = 0; i < tail.Count; i++)
                    tail[i].gameObject.SetActive(false);
                tail.Clear();
                transform.position = new Vector3(0, 0, 0);
                isDied = false;
                gameover_text.SetActive(false);
                Score = 0;
                Score_display.text = "现在分数：\n" + Score;
            }
        }
    }
    void Move()
    {
        if (!isDied)
        {
            Vector2 v = transform.position;
            transform.Translate(dir);
            if (ate)
            {
                GameObject g = (GameObject)Instantiate(tailPrefab, v, Quaternion.identity);
                tail.Insert(0, g.transform);
                ate = false;
            }
            else if (tail.Count > 0)
            {
                tail.Last().position = v;
                tail.Insert(0, tail.Last());
                tail.RemoveAt(tail.Count - 1);
            }
        }
    }
    void OnTriggerEnter2D(Collider2D coll)
    {
        if (coll.name.StartsWith("Food"))
        {
            ate = true;
            GetComponent<AudioSource>().Play();
            Score_display.text = "现在分数：\n" + ++Score;
            Destroy(coll.gameObject);
        }
        else
        {
            isDied = true;
            gameover_text.SetActive(true);
        }
    }
}

完成

SHXJ
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