unity实现简单贪吃蛇游戏

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。