用Unity製做貪吃蛇小遊戲

1.新建一個2D項目,導入資源包，建立好Assets目錄下的子文件夾

2.建立一個3D Object裏的Quad用做遊戲的背景，將它重命名爲BG，將它的尺寸設置爲：

3.利用Cube建立蛇頭和蛇身，重命名爲SnakeHead、SnakeBody,並賦上材質，將SnakeBody拖動到Prefabs中，爲它編寫一個腳原本控制蛇頭,蛇身的移動。代碼以下：

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

public class SnakeMove : MonoBehaviour {
	List<Transform> body=new List<Transform>();
	Vector2 direction=Vector2.up;
	public GameObject snakeBody;
	private bool flag;
	float speed=0.3f;
	void Move(){
		Vector2 position=transform.position;

		if(flag)
		{
			GameObject bodypfb=(GameObject)Instantiate(snakeBody,position,Quaternion.identity);
			body.Insert(0,bodypfb.transform);
			flag=false;
		}
		else if(body.Count>0)
		{
			body.Last().position=position;
			body.Insert(0,body.Last().transform);
			body.RemoveAt(body.Count-1);
		}
		this.transform.Translate(direction);
	}
	// Use this for initialization
	void Start () {
		InvokeRepeating("Move",speed,speed);
	}
	
	// Update is called once per frame
	void Update () {
		if(Input.GetKeyDown(KeyCode.W) || (Input.GetKeyDown(KeyCode.UpArrow)))
		{
			direction=Vector2.up;
		}
		else if(Input.GetKeyDown(KeyCode.S) || (Input.GetKeyDown(KeyCode.DownArrow)))
		{
			direction=Vector2.down;
		}
		else if(Input.GetKeyDown(KeyCode.A) || (Input.GetKeyDown(KeyCode.LeftArrow)))
		{
			direction=Vector2.left;
		}
		else if(Input.GetKeyDown(KeyCode.D) || (Input.GetKeyDown(KeyCode.RightArrow)))
		{
			direction=Vector2.right;
		}
	}

	void OnTriggerEnter(Collider coll) 
	{
		if(coll.gameObject.CompareTag("food"))
		{
			Destroy(coll.gameObject);
			flag=true;
		}
		else
		{
			SceneManager.LoadScene(0);
		}
	}
}

蛇頭的參數設置：

蛇身的參數設置：

4.利用Cube建立食物,重命名爲Food,並賦上材質，將它拖到Prefabs中，爲它編寫一個腳原本控制食物的生成。代碼以下：

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

public class FoodCreate : MonoBehaviour {
	public GameObject s_food;
	public int x_limit=30;
	public int y_limit=16;

	void Food()
	{
		int x=Random.Range(-x_limit,x_limit);
		int y=Random.Range(-y_limit,y_limit);
		Instantiate(s_food,new Vector2(x,y),Quaternion.identity);
	}
	// Use this for initialization
	void Start () {
		InvokeRepeating("Food",2,3);
	}
	
	// Update is called once per frame
	void Update () {
		
	}
}

食物的參數設置：

5.在BG裏建立4個Empty對象，並將它們重命名爲Left,Right,Top,Bottom,同時給它們添加一個Box Collider,調整位置及大小以下：

6.爲遊戲場景建立一個UI界面

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

public class SnakeUI : MonoBehaviour {

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
		if(Input.GetMouseButtonDown(0))
		{
			SceneManager.LoadScene(1);
		}
	}
}

7.攝像機的參數設置：