本文实例为大家分享了unity实现贪吃蛇游戏的具体代码，供大家参考，具体内容如下

首先创建一个头部，编写脚本利用WASD控制头部的移动。

Vector3 up=new Vector3(0,1,0);Vector3 down=new Vector3(0,-1,0);Vector3 left=new Vector3(-1,0,0);Vector3 right=new Vector3(1,0,0);Vector3 now;//头部实际前进方向 float timer=0f; float timerGap=0.1f; void Start () { now = up; } void Update () { if (now!=up&&now!=down&&Input.GetKey (KeyCode.W)) { now = up; } if (now!=up&&now!=down&&Input.GetKey (KeyCode.S)) { now = down; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.A)) { now=left; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.D)) { now = right; } timer += Time.deltaTime; if (timer > timerGap) { //每隔0.1s向当前方向移动一个单位（0.5为头部大小）。 timer = 0; transform.position = 0.5f * now + transform.position; } }

然后就是创建初始身体，实现身体跟随头部。采用的方法是将身体放进一个数组，然后下标0的身体移动到头部之前的位置，然后下标 i 的身体移动到 i-1 的position。

创建初始身体，并放入数组。

public GameObject body;//身体预设体List<GameObject> snakeBody = new List<GameObject>(); void Awake() { for (int i = 0; i < 3; ++i) { GameObject newbodynext=Instantiate (body, transform.position-(i+1)*new Vector3(0,0.5f,0), Quaternion.identity)as GameObject; snakeBody.Add (newbodynext); } }

实现跟随

void Update () { if (now!=up&&now!=down&&Input.GetKey (KeyCode.W)) { now = up; } if (now!=up&&now!=down&&Input.GetKey (KeyCode.S)) { now = down; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.A)) { now=left; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.D)) { now = right; } timer += Time.deltaTime; if (timer > timerGap) { Vector3 tmpPosition = transform.position;//记录头部变化前的位置 List<Vector3> tmpList = new List<Vector3> ();//记录身体变化前的位置 for (int i = 0; i < snakeBody.Count; ++i) { tmpList.Add (snakeBody [i].transform.position); } timer = 0; transform.position = 0.5f * now + transform.position; snakeBody [0].transform.position = tmpPosition;//将0移到头部之前的位置 //依次前移身体的位置 for (int i = 1; i < snakeBody.Count; ++i) { snakeBody [i].transform.position = tmpList [i - 1]; } }}

初始蛇创建好后，就开始添加食物，和增长蛇的身体。还有检测游戏失败，即撞到身体或者边界，采用事件触发检测完成。

创建食物

public GameObject foodPrefab;//食物预设体void Start () { now = up; createFood (); } void createFood() { float x = Random.Range(-6.5f, 6.5f); float y = Random.Range(-4.5f, 4.5f); Instantiate(foodPrefab,new Vector3(x,y,0f),Quaternion.identity); }

触发检测

void OnTriggerEnter(Collider other) { //这个other就是被碰撞体 if (other.gameObject.tag.Equals("Food")) { Destroy(other.gameObject); GameObject newbodynext = Instantiate (body, snakeBody[snakeBody.Count-1].transform.position, Quaternion.identity)as GameObject; snakeBody.Add (newbodynext);//增加蛇的身体 createFood(); } else if(other.gameObject.tag.Equals("Body")) { SceneManager.LoadScene("Snake", LoadSceneMode.Single);//重新开始 } } void OnTriggerExit(Collider other) { if (other.gameObject.tag.Equals("Boundary")) SceneManager.LoadScene("Snake", LoadSceneMode.Single); }

完整代码

using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.SceneManagement;public class HeadMove : MonoBehaviour { public GameObject body; public GameObject foodPrefab; Vector3 up=new Vector3(0,1,0); Vector3 down=new Vector3(0,-1,0); Vector3 left=new Vector3(-1,0,0); Vector3 right=new Vector3(1,0,0); Vector3 now; float timer=0f; float timerGap=0.1f; List<GameObject> snakeBody = new List<GameObject>(); // Use this for initialization void Awake() { for (int i = 0; i < 3; ++i) { GameObject newbodynext=Instantiate (body, transform.position-(i+1)*new Vector3(0,0.5f,0),Quaternion.identity)as GameObject; snakeBody.Add (newbodynext); } } void Start () { now = up; createFood (); } void createFood() { float x = Random.Range(-6.5f, 6.5f); float y = Random.Range(-4.5f, 4.5f); Instantiate(foodPrefab,new Vector3(x,y,0f),Quaternion.identity); } // Update is called once per frame void Update () { if (now!=up&&now!=down&&Input.GetKey (KeyCode.W)) { now = up; } if (now!=up&&now!=down&&Input.GetKey (KeyCode.S)) { now = down; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.A)) { now=left; } if (now!=left&&now!=right&&Input.GetKey (KeyCode.D)) { now = right; } timer += Time.deltaTime; if (timer > timerGap) { Vector3 tmpPosition = transform.position; List<Vector3> tmpList = new List<Vector3> (); for (int i = 0; i < snakeBody.Count; ++i) { tmpList.Add (snakeBody [i].transform.position); } timer = 0; transform.position = 0.5f * now + transform.position; snakeBody [0].transform.position = tmpPosition; for (int i = 1; i < snakeBody.Count; ++i) { snakeBody [i].transform.position = tmpList [i - 1]; } } } void OnTriggerEnter(Collider other) { //这个other就是被碰撞体 if (other.gameObject.tag.Equals("Food")) { Destroy(other.gameObject); GameObject newbodynext = Instantiate (body,snakeBody[snakeBody.Count-1].transform.position,Quaternion.identity)as GameObject; snakeBody.Add (newbodynext); createFood(); } //由于身体和头部一开始就接触，所以将身体的碰撞半径减小到0.4 else if(other.gameObject.tag.Equals("Body")) { SceneManager.LoadScene("Snake", LoadSceneMode.Single); } } void OnTriggerExit(Collider other) { if (other.gameObject.tag.Equals("Boundary")) SceneManager.LoadScene("Snake", LoadSceneMode.Single); }}

将该脚本挂载在头部对象上然后添加身体和食物预设体，再添加边界即可。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。