Unity實現3D貪喫蛇的移動，喫食功能

記錄一下前段時間寫到的一個3d貪喫蛇的移動代碼。

鏈接：https://pan.baidu.com/s/1A20rPyKoWf5RsqL6ehBQhA
提取碼：vs6f

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


public class GameManager : MonoBehaviour
{
    List<Transform> bodyList = new List<Transform>();//身體位置的列表
    private  float speed = 2f;//移動速度
    public GameObject bodyObj;//用來生成的身體對象
    List<Transform>  bodyCreatePostion = new List<Transform>();//身體部分的transfrom 列表
    private float TransOffset=1f;//位置間隔
    private List<Vector2> mapAddress=new List<Vector2>();//前進目標在地圖上的位置，
    public Transform firstBody;//第一個身體部件的transfrom
    const int row = 100;//地圖寬
    const int col = 100;//地圖高
    int step=1;//步伐
    int x=0, z=0;//記錄x和z軸的移動量

    // Start is called before the first frame update
    public Vector3[,] map = new Vector3[row, col];//地圖
    // Start is called before the first frame update
    void Start()
    {
       
        for (int i = 0; i < row; i++)//生成地圖
        {
            for (int j = 0; j < col; j++)
            {
                map[i, j] = new Vector3(i, 1.5f, j);
            }
        }
        transform.position =map[0,0];將當前位置設爲原點
        mapAddress.Add(new Vector2(1,0));//增加第一個目標
        bodyList.Add(transform);//刷新第一個頭和一個身體的transform
        bodyList.Add(firstBody);
        mapAddress.Add(new Vector2(0,0));
    }

    // Update is called once per frame
    void Update()
    {
        for (int i = 0; i < row - 1; i++)
        {
            for (int j = 0; j < col - 1; j++)//繪製地圖格子
            {
                Debug.DrawLine(map[i, j], map[i + 1, j], Color.red);
                Debug.DrawLine(map[i, j], map[i, j + 1], Color.red);
            }
        }
        if (Input.anyKeyDown)//有任何鍵按下
        {
            if (Input.GetKeyDown(KeyCode.W) && z != -step)//上
            {
                z = step;
                x = 0;


            }
            if (Input.GetKeyDown(KeyCode.S) && z != step)//下
            {
                z = -step;
                x = 0;
               
            
            }
            if (Input.GetKeyDown(KeyCode.A) && x != step)//左
            {
                x = -step;
                z = 0;

         
            }
            if (Input.GetKeyDown(KeyCode.D) && x != -step)//右
            {
                x = step;
                z = 0;
           
              
            }
           

        }
        Move();


    }
    private void Move()//移動
    {


        if (Vector3.Distance(bodyList[0].position, map[(int)mapAddress[0].x + x, (int)mapAddress[0].y + z]) < 0.7f)//當前座標和目標位置的距離小於0.5f
        {
          
            for (int i = mapAddress.Count - 1; i > 0; i--)//刷新後一個的目標爲前一個的目標
            {
                mapAddress[i] = mapAddress[i-1];
            }
            
            mapAddress[0] = new Vector2(mapAddress[0].x + x, mapAddress[0].y + z);//刷新第一個目標的位置

        }
        else
        {
            for (int i = bodyList.Count - 1; i > 0; i--)//移動
            {
                bodyList[i].position = Vector3.MoveTowards(bodyList[i].position,
                                                     map[(int)mapAddress[i - 1].x, (int)mapAddress[i - 1].y], Time.deltaTime * speed);

            }
            bodyList[0].position = Vector3.MoveTowards(transform.position,
                                                    map[(int)mapAddress[0].x + x, (int)mapAddress[0].y + z], Time.deltaTime * speed);
        }
    }

    private void OnCollisionEnter(Collision collision)//碰撞到了食物就增加身體長度
    {

        if (collision.collider.tag == "Food")
        {
          
            Destroy(collision.collider.gameObject);
            GameObject tmpGameObject=new GameObject();
            Vector2 tmpVec = new Vector2();
            
            tmpGameObject = Instantiate(bodyObj, map[(int)mapAddress[mapAddress.Count - 1].x+x, (int)mapAddress[mapAddress.Count - 1].y +z], Quaternion.identity);//生成body物體
            tmpVec = new Vector2(mapAddress[mapAddress.Count - 1].x+x, mapAddress[mapAddress.Count - 1].y +z);
            //增加身體的transform和目標向量
            bodyList.Add(tmpGameObject.transform);
            mapAddress.Add(tmpVec);
        }
     
    }
}