DDR爱好者之家 Design By 杰米

原生JavaScript实现贪吃蛇游戏的具体代码,供大家参考,具体内容如下

原生js实现贪吃蛇游戏

代码:

<script>
 var timer = null;
 var oMain = document.getElementById("main");
 
 function Map(atom,xnum,ynum){//地图,设置单位大小,及根据单位大小创建地图
  this.atom = atom;
  this.xnum = xnum;
  this.ynum = ynum;
  
  this.create = function(){
  
  this.canvas = document.createElement("div");
  this.canvas.style.cssText = "position: relative;top: 40px;border: 1px solid red;background: #F1F1F1;"
  this.canvas.style.width = this.atom * this.xnum + "px";//画布宽
  this.canvas.style.height = this.atom * this.ynum + "px";//画布高
  main.appendChild(this.canvas);
  }
 }
 
 function Food(map){//食物
  this.width = map.atom;
  this.height = map.atom;
  //实现随机背景色
  this.bgColor = "rgb("+Math.floor(Math.random()*200)+","+Math.floor(Math.random()*200)+","+Math.floor(Math.random()*200)+")";
 
  this.x = Math.floor(Math.random()*map.xnum);
  this.y = Math.floor(Math.random()*map.ynum);
  
  this.flag = document.createElement('div');
  this.flag.style.width = this.width + 'px';
  this.flag.style.height = this.height + 'px';
  this.flag.style.backgroundColor = this.bgColor;
  this.flag.style.borderRadius = '50%';
  this.flag.style.position = "absolute";
  this.flag.style.left = this.x * this.width + 'px';
  this.flag.style.top = this.y * this.height + 'px';
  
  map.canvas.appendChild(this.flag);
 }
 
 //重新开始
 function restart(map,snake){
  for(var i=0; i<snake.body.length; i++){
  map.canvas.removeChild(snake.body[i].flag);
  }
  snake.body = [
  {x : 2,y : 0},//蛇头
  {x : 1,y : 0},//蛇身
  {x : 0,y : 0}//蛇尾
  ]
  snake.direction = "right";
  snake.display();
  
  map.canvas.removeChild(food.flag);
  food = new Food(map);
 }
 
 function Snake(map){
  this.width = map.atom;
  this.height = map.atom;
  
  this.direction = "right";
  
  this.body = [
  {x : 2,y : 0},
  {x : 1,y : 0},
  {x : 0,y : 0}
  ]
  
  this.display = function(){
  for(var i=0; i<this.body.length; i++){
   if(this.body[i].x != null){
   var s = document.createElement('div');
   //将节点保存
   this.body[i].flag = s;
   
   //设置样式
   s.style.width = this.width + 'px';
   s.style.height = this.height + 'px';
   s.style.backgroundColor = "rgb("+Math.floor(Math.random()*200)+","+Math.floor(Math.random()*200)+","+Math.floor(Math.random()*200)+")";
   s.style.borderRadius = '50%';
   
   //设置位置
   s.style.position = "absolute";
   s.style.left = this.body[i].x * this.width + 'px';
   s.style.top = this.body[i].y * this.height + 'px';
   
   //添加到地图
   map.canvas.appendChild(s);
   }
  }
  }
  
  this.run = function(){
  for(var i=this.body.length-1; i>0; i--){
   this.body[i].x = this.body[i-1].x;
   this.body[i].y = this.body[i-1].y
   
  }
  switch(this.direction){
   case "left":this.body[0].x -= 1;break;
   case "right":this.body[0].x += 1;break;
   case "up":this.body[0].y -= 1;break;
   case "down":this.body[0].y += 1;break;
  }
  //吃食物
  if(this.body[0].x == food.x && this.body[0].y == food.y){
   this.body.push({x : null,y : null,flag : null});
   
   map.canvas.removeChild(food.flag);
   food = new Food(map);
  }
  
  //判断游戏结束
  if(this.body[0].x<0 || this.body[0].x>map.xnum-1 || this.body[0].y<0 || this.body[0].y>map.ynum-1){
   clearInterval(timer);
   alert("GAME OVER!");
   restart(map,this);
   return false;
  }
  for(var i=4; i<this.body.length; i++){
   if(this.body[0].x == this.body[i].x && this.body[0].y == this.body[i].y){
   clearInterval(timer);
   alert("GAME OVER!");
   restart(map,this);
   return false;
   }
  }
  
  //删除原来
  for(var i=0; i<this.body.length; i++){
   if(this.body[i].flag != null){
   map.canvas.removeChild(this.body[i].flag);
   }
  }
  this.display();
  }
 }

 
 //创建地图对象
 var map = new Map(20,40,20);
 map.create();
 
 //创建食物对象
 var food = new Food(map);
 
 //创建蛇对象
 var snake = new Snake(map);
 snake.display();
 
 
 //加上键盘事件(改变蛇头方向)
 window.onkeydown = function(e){
  event = e || window.event;
  
  switch(event.keyCode){
  case 38:
   if(snake.direction != "down")//禁止掉头
   snake.direction = "up";
  break;
  case 40:
   if(snake.direction != "up")
   snake.direction = "down";
  break;
  case 37:
   if(snake.direction != "right")
   snake.direction = "left";
  break;
  case 39:
   if(snake.direction != "left")
   snake.direction = "right";
  break;
  }
 }
 
 var speed = 100;
 
 function start(){
  clearInterval(timer);
  timer = setInterval(function(){
  snake.run();
  document.getElementById("score").innerHTML = snake.body.length-3;
  start();
  },speed)
 }
 
 //难度
 document.getElementById("1").onclick = function(){
  speed = 100;
 }
 
 document.getElementById("2").onclick = function(){
  speed = 50;
 }
 
 document.getElementById("3").onclick = function(){
  speed = 20;
 }
 
 document.getElementById("begin").onclick = function(){
  start();
 }
 
 document.getElementById("pause").onclick = function(){
  
  clearInterval(timer);
 }
</script>

代码仅有js部分,完整代码可以上我的github免费下载

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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。

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DDR爱好者之家 Design By 杰米

稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!

昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。

这里面让他访问的是一个国服的战网网址,com.cn和后面的zh都非常明白地表明这就是国服战网。

而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?