编程 Javascript

JS实现简单贪吃蛇小游戏

Posted in Javascript onOctober 28, 2020

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

1、使用语言 HTML+CSS+JavaScript
2、使用工具 visual studio code
3、GitHub项目地址：贪吃蛇
4、项目运行截图：

JS实现简单贪吃蛇小游戏

5、项目功能分析：主要使用数组来存储蛇的位置，地图和蛇都是一个二维数组，对于有蛇的地方，地图的CSS就会发生改变，同时添加了添加了一个音乐播放按钮，通过CSS动画实现旋转。

6、项目代码：（项目代码有详细的注释）

snake.html

<!--
 * @Author: CSU_XZY
 * @Date: 2020-10-13 22:06:51
 * @LastEditors: CSU_XZY
 * @LastEditTime: 2020-10-18 17:08:54
 * @FilePath: \第二天\贪吃蛇\snake.html
 * @Description: just to play
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>eatSnake</title>
<head>
 <style type="text/css">
 *{
 margin:0;
 padding:0;
 border: 0px;
 }
 body{
 background: #444;
 }
 table{
 border-collapse:collapse;
 overflow: hidden;
 border:1px solid #ddd;
 margin:10px auto 10px auto;
 }
 td{
 display: table-cell;
 width:20px;
 height:20px;
 background: #fff;
 border:1px #eeeeee solid;
 }
 .snake{
 background: #3388ee;
 }
 .notsnake{
 background: #fff;
 }
 .food{
 background: #33aa33;
 }
 .snake_head{
 background: #dd4444;
 }
 .notice{
 width:450px;
 text-align: center;
 margin:50px auto;
 color:#fff;
 font-size: 14px;
 }
 </style>
</head>
<body>
<p class="notice">提示：空格键控制开始/ 暂停，方向键控制蛇的移动方向，F5刷新</p>
<script type="text/javascript" src="snake.js"></script>
</body>
</html>

snake.js

/*
 * @Author: CSU_XZY
 * @Date: 2020-10-17 12:38:26
 * @LastEditors: CSU_XZY
 * @LastEditTime: 2020-10-18 22:40:24
 * @FilePath: \第二天\snake\snake.js
 * @Description: just to play
 */
window.onload = function(){
 var snake = function(width,height,snakeId,speed){
  this.width = width || 10;
  this.height = height || 10;
  this.snakeId = snakeId || "snake";
  this.goX = 0;
  this.goY = 0;
  this.speed = this.oldSpeed = speed || 10;
  this.Grid = []; //存放td的二维数组
  this.snakeGrid = []; //存放蛇的数组
  this.foodGrid = [];
  this.snakeTimer = null;
  this.derectkey = 39;
  this.stop = true;
  this.init();
  document.getElementById("myAudio").play();
  box.style.animationPlayState = 'running'
 }

 snake.prototype = {
  //创建二维数组
  multiArray : function(m , n)
  {
   var array = new Array(m); //长
   for(let i = 0; i < m; i++)
   {
    array[i] = new Array(n); //宽
   }
   return array;
  },
  //函数修正this
  bind : function(fn,context)
  {
   return function(){
 return fn.apply(context,arguments);
 }
  },
  //移动的主函数
  move:function(){
 var _this = this;
 if(_this.snakeTimer){clearInterval(_this.snakeTimer);}
 _this.snakeTimer = setInterval(_this.bind(_this.main,_this),Math.floor(3000/this.speed));
  },
  //重来
  reset()
  {
   this.goX = 0;
   this.goY = 0;
   this.speed = this.oldSpeed;
   this.derectkey = 39;
   this.stop = true;
   this.init();
  },
  //确定键盘事件
  keyDown : function(e)
  { 
   var e = e || window.event;
   var keycode = e?e.keyCode:0;
   if(keycode == 116 )
   window.location.reload();
   if(keycode == 32)
   {
    if(this.stop)
    {
     this.move();
     this.stop = false;
    }
    else{
     if(this.snakeTimer)
     clearInterval(this.snakeTimer);
     this.stop = true;
    }
   }
   if(keycode>=37 && keycode <= 40)
    {
     if(!this.stop)
     this.derectkey = keycode;
    }
   return false;
  },
  //创建地图
  creatMap : function()
  {
   var table = document.createElement("table");
   var tbody = document.createElement("tbody");
   for(let i = 0; i < this.width; i++)
   {
    var tr = document.createElement("tr");
    for(let j = 0; j < this.height; j++)
    {
     var td = document.createElement("td");
     this.Grid[i][j] = tr.appendChild(td);
    }
    tbody.appendChild(tr);
   }
   table.appendChild(tbody);
   table.id = this.snakeId;
   document.body.appendChild(table);
  },
  //产生随机点
  randomPoint : function(initX,initY,endX,endY)
  {
   var p = []; //用来存放产生的随机点的数组
   var initX = initX || 0;
   var initY = initY || 0;
   var endX = endX || this.width;
   var endY = endY || this.height;
   p[0] = Math.floor(Math.random()*(endX - initX)) + Math.floor(initX);
   p[1] = Math.floor(Math.random()*(endY - initY)) + Math.floor(initY)
   return p;
  },
  //初始化食物的位置
  initFood : function()
  {
   this.foodGrid = this.randomPoint();

   if(this.isInSnake(this.foodGrid))
   {
    this.initFood();
    return false;
   }
   this.Grid[this.foodGrid[0]][this.foodGrid[1]].className = "food";
  },
  //判断点是否在蛇身上
  isInSnake : function(point,pos)
  {
   var snakeGrid = this.snakeGrid;
   if(point instanceof Array)
   {
    let n = snakeGrid.length;
    for(let i = pos || 0; i < n; i++)
    {
     if(point[0] == snakeGrid[i][0] && point[1] == snakeGrid[i][1])
     return true;
    }
   }
   return false;
  },
  //给蛇涂颜色
  paintSnake : function(){
   var snakeGrid = this.snakeGrid;
   for(let i = 0; i < snakeGrid.length; i++)
   {
    this.Grid[snakeGrid[i][0]][snakeGrid[i][1]].className = "snake_body";
   }
  },
  //初始化蛇的位置
  initSnake : function()
  {
   this.snakeGrid = [];

   this.snakeGrid.push([1,3]);
   this.snakeGrid.push([1,2]);
   this.snakeGrid.push([1,1]);

   this.paintSnake();

   this.Grid[this.snakeGrid[0][0]][this.snakeGrid[0][1]].className = "snake_head";
   this.Grid[this.snakeGrid[this.snakeGrid.length-1][0]][this.snakeGrid[this.snakeGrid.length-1][1]].className = "snake_tail";
  },
  //判断蛇是否撞墙
  isInWall : function(point){
   if(point instanceof Array){
    if(point[0] < 0 || point[0] > this.width1 - 1 || point[1] < 0 || point[1] > this.height - 1)
    return true;
   } 
   return false;
  },
  //初始化条件
  
  //控制函数运行的主函数
  main : function(){
   var snakeGrid = this.snakeGrid;
   var temp = snakeGrid[snakeGrid.length-1],
    isEnd = false;
    headX = snakeGrid[0][0];
    headY = snakeGrid[0][1];
    msg = "";
   switch(this.derectkey)
   {
    case 37:
  if(this.goY!=1){this.goY=-1;this.goX=0} //防止控制蛇往相反反方向走
  break;
 case 38:
  if(this.goX!=1){this.goX=-1;this.goY=0}
  break;
 case 39:
  if(this.goY!=-1){this.goY=1;this.goX=0}
  break;
 case 40:
  if(this.goX!=-1){this.goX=1;this.goY=0}
   }
   headX += this.goX;
   headY += this.goY;

   if(headX == this.foodGrid[0] && headY == this.foodGrid[1])
   {
    this.snakeGrid.unshift(this.foodGrid);
    this.initFood();
    if(this.snakeGrid.length>4){ //控制蛇加速
  if(this.snakeGrid.length==5){
  this.speed += 5;
  }
  else if(this.snakeGrid.length==10){
  this.speed += 3;
  }
  else if(this.snakeGrid.length==20){
  this.speed += 3;
  }
  else if(this.snakeGrid.length==30){
  this.speed += 3;
  }
  this.move();
 }
   }
   else
   {
    for(var i=this.snakeGrid.length-1;i>0;i--){
  this.snakeGrid[i] = this.snakeGrid[i-1] ;
 }
    this.snakeGrid[0] = [headX,headY]; 
    if(this.isInSnake(this.snakeGrid[0],1)){
  isEnd=true;
  msg = "哈皮，吃到自己啦！！";
 }
 //判断是否撞墙
 else if(this.isInWall(this.snakeGrid[0])){
  isEnd =true;
  msg = "撒比伟哥，撞墙了！！";
    }
    if(isEnd)
    {
     if(this.snakeTimer)
     clearInterval(this.snakeTimer);
     var score;
     let len = this.snakeGrid.length;
     if(len <= 5)
     score = len-3;
     else if(len>5 && len<=10)
     {
      score = 2 + 2*(len-5)
     }
     else if(len>10 && len <= 20)
     score = 12 + 3*(len-10);
     else
     score = 27 + 5*(len - 15);
     if(confirm(msg+"你的分数是："+score+"！ 是否重新开始？")){
  this.reset();
  }
  return false;
    }
    this.Grid[temp[0]][temp[1]].className = "notSnake";
   }
   this.paintSnake();
   this.Grid[headX][headY].className = "snake_head";
   this.Grid[this.snakeGrid[this.snakeGrid.length-1][0]][this.snakeGrid[this.snakeGrid.length-1][1]].className = "snake_tail";
  },
  init : function(){
   var _this = this;
   snake_id = document.getElementById(_this.snakeId)||0 ;
 if(snake_id){
 document.body.removeChild(snake_id);
 }
   _this.Grid = _this.multiArray(_this.width,_this.height);
   _this.creatMap();
   _this.initSnake();
   _this.initFood();
   document.onkeydown = _this.bind(_this.keyDown,_this);
  }
 }
 new snake(20,20,"snake",10);
}

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三水点靠木。

JS实现简单贪吃蛇小游戏

- Author -

烯烃@

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐

分享十五个最佳jQuery 幻灯插件和教程

Mar 27 Javascript

JQuery DataTable删除行后的页面更新利用Ajax解决

May 17 Javascript

jquery遍历table的tr获取td的值实现方法

May 19 Javascript

浅谈js图片前端预览之filereader和window.URL.createObjectURL

Jun 30 Javascript

jquery设置表单元素为不可用的简单代码

Jul 04 Javascript

JavaScript制作简易计算器（不用eval）

Feb 05 Javascript

详解Angular 4.x NgTemplateOutlet

May 24 Javascript

关于JavaScript中的this指向问题总结篇

Jul 23 Javascript

js定时器实现倒计时效果

Nov 05 Javascript

微信小程序使用 vant Dialog组件的正确方式

Feb 21 Javascript

JavaScript中的函数式编程详解

Aug 22 Javascript

基于Vue+Webpack拆分路由文件实现管理

Nov 16 Javascript

VUE和Antv G6实现在线拓扑图编辑操作

Oct 28 #Javascript

在vue项目中引用Antv G2,以饼图为例讲解

Oct 28 #Javascript

在Vue中使用Viser说明(基于AntV-G2可视化引擎)

Oct 28 #Javascript

antd vue table跨行合并单元格,并且自定义内容实例

Oct 28 #Javascript

js 实现碰撞检测的示例

Oct 28 #Javascript

在antd Table中插入可编辑的单元格实例

Oct 28 #Javascript

vue用ant design中table表格,点击某行时触发的事件操作

Oct 28 #Javascript