用unity 写贪吃蛇

A: 以下是一个简单的Unity贪吃蛇游戏的示例：

1.创建一个Cube作为蛇身子。

2.创建一个Sphere作为食物。

3.编写一个脚本Snake.cs处理蛇的移动。

using UnityEngine;

using System.Collections;

public class Snake : MonoBehaviour

{

public float speed = 1;

private Vector3 dir;

private ArrayList bodyList = new ArrayList();

public GameObject bodyPrefab;

public int count = 0;

void Start ()

{

dir = new Vector3 (0, 0, speed);

StartCoroutine (Move ());

}

void Update ()

{

if (Input.GetKey (KeyCode.UpArrow) && dir != -Vector3.forward)

dir = Vector3.forward;

else if (Input.GetKey (KeyCode.DownArrow) && dir != Vector3.forward)

dir = -Vector3.forward;

else if (Input.GetKey (KeyCode.LeftArrow) && dir != Vector3.right)

dir = -Vector3.right;

else if (Input.GetKey (KeyCode.RightArrow) && dir != -Vector3.right)

dir = Vector3.right;

}

IEnumerator Move ()

{

while (true) {

transform.Translate (dir);

if (bodyList.Count > 0) {

Vector3 v = transform.position;

for (int i = 0; i < bodyList.Count; i++) {

GameObject go = (GameObject)Instantiate (bodyPrefab, v, Quaternion.identity);

bodyList [i] = go;

v = (bodyList [i] as GameObject).transform.position;

}

}

yield return new WaitForSeconds (0.2f);

}

}

void OnTriggerEnter (Collider other)

{

if (other.gameObject.CompareTag ("Food")) {

Destroy (other.gameObject);

count ++;

GameObject go = (GameObject)Instantiate (bodyPrefab, transform.position, Quaternion.identity);

bodyList.Insert (0, go);

}

}

}

4.编写一个脚本Food.cs在地图中随机生成食物。

using UnityEngine;

using System.Collections;

public class Food : MonoBehaviour

{

public GameObject foodPrefab;

public void CreateFood()

{

float x = Random.Range (-9, 9);

float z = Random.Range (-9, 9);

Instantiate (foodPrefab, new Vector3 (x, 0.5f, z), Quaternion.identity);

}

}

5.将Snake.cs和Food.cs挂载到场景中的游戏对象上。

6.在场景中创建一个空对象并添加Food.cs脚本，保证每隔几秒钟生成一个新的食物。

using UnityEngine;

using System.Collections;

public class GenerateFood : MonoBehaviour

{

public Food food;

void Start ()

{

food.CreateFood ();

StartCoroutine (Create ());

}

IEnumerator Create ()

{

while (true) {

yield return new WaitForSeconds (2f);

food.CreateFood ();

}

}

}

这样就可以实现一个简单的贪吃蛇游戏。