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JS寫的貪吃蛇游戲(個人練習(xí))

更新時間：2013年07月08日 17:51:23 作者：

本文為大家介紹的是使用JS寫的貪吃蛇游戲,個人練習(xí)之用，感興趣的額朋友可以參考下哈，希望對大家學(xué)習(xí)js有所幫助

JS貪吃蛇游戲，個人練習(xí)之用，放在這備份一下，

 
<!DOCTYPE html> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>JS貪吃蛇-練習(xí)</title> 
<style type="text/css"> 
#pannel table { 
border-collapse: collapse; 
} 
#pannel table td { 
border: 1px solid #808080; 
width: 10px; 
height: 10px; 
font-size: 0; 
line-height: 0; 
overflow: hidden; 
} 
#pannel table .snake { 
background-color: green; 
} 
#pannel table .food { 
background-color: blue; 
} 
</style> 
<script type="text/javascript"> 
var Direction = new function () { 
this.UP = 38; 
this.RIGHT = 39; 
this.DOWN = 40; 
this.LEFT = 37; 
}; 
var Common = new function () { 
this.width = 20; /*水平方向方格數(shù)*/ 
this.height = 20; /*垂直方向方格數(shù)*/ 
this.speed = 250; /*速度 值越小越快*/ 
this.workThread = null; 
}; 
var Main = new function () { 
var control = new Control(); 
window.onload = function () { 
control.Init("pannel"); 
/*開始按鈕*/ 
document.getElementById("btnStart").onclick = function () { 
control.Start(); 
this.disabled = true; 
document.getElementById("selSpeed").disabled = true; 
document.getElementById("selSize").disabled = true; 
}; 
/*調(diào)速度按鈕*/ 
document.getElementById("selSpeed").onchange = function () { 
Common.speed = this.value; 
} 
/*調(diào)大小按鈕*/ 
document.getElementById("selSize").onchange = function () { 
Common.width = this.value; 
Common.height = this.value; 
control.Init("pannel"); 
} 
}; 
}; 
/*控制器*/ 
function Control() { 
this.snake = new Snake(); 
this.food = new Food(); 
/*初始化函數(shù)，創(chuàng)建表格*/ 
this.Init = function (pid) { 
var html = []; 
html.push("<table>"); 
for (var y = 0; y < Common.height; y++) { 
html.push("<tr>"); 
for (var x = 0; x < Common.width; x++) { 
html.push('<td id="box_' + x + "_" + y + '">&nbsp;</td>'); 
} 
html.push("</tr>"); 
} 
html.push("</table>"); 
this.pannel = document.getElementById(pid); 
this.pannel.innerHTML = html.join(""); 
}; 
/*開始游戲 - 監(jiān)聽鍵盤、創(chuàng)建食物、刷新界面線程*/ 
this.Start = function () { 
var me = this; 
this.MoveSnake = function (ev) { 
var evt = window.event || ev; 
me.snake.SetDir(evt.keyCode); 
}; 
try { 
document.attachEvent("onkeydown", this.MoveSnake); 
} catch (e) { 
document.addEventListener("keydown", this.MoveSnake, false); 
} 
this.food.Create(); 
Common.workThread = setInterval(function () { 
me.snake.Eat(me.food); me.snake.Move(); 
}, Common.speed); 
}; 
} 
/*蛇*/ 
function Snake() { 
this.isDone = false; 
this.dir = Direction.RIGHT; 
this.pos = new Array(new Position()); 
/*移動 - 擦除尾部，向前移動，判斷游戲結(jié)束(咬到自己或者移出邊界)*/ 
this.Move = function () { 
document.getElementById("box_" + this.pos[0].X + "_" + this.pos[0].Y).className = ""; 
//所有 向前移動一步 
for (var i = 0; i < this.pos.length - 1; i++) { 
this.pos[i].X = this.pos[i + 1].X; 
this.pos[i].Y = this.pos[i + 1].Y; 
} 
//重新設(shè)置頭的位置 
var head = this.pos[this.pos.length - 1]; 
switch (this.dir) { 
case Direction.UP: 
head.Y--; 
break; 
case Direction.RIGHT: 
head.X++; 
break; 
case Direction.DOWN: 
head.Y++; 
break; 
case Direction.LEFT: 
head.X--; 
break; 
} 
this.pos[this.pos.length - 1] = head; 
//遍歷畫蛇，同時判斷游戲結(jié)束 
for (var i = 0; i < this.pos.length; i++) { 
var isExits = false; 
for (var j = i + 1; j < this.pos.length; j++) 
if (this.pos[j].X == this.pos[i].X && this.pos[j].Y == this.pos[i].Y) { 
isExits = true; 
break; 
} 
if (isExits) { this.Over();/*咬自己*/ break; } 
var obj = document.getElementById("box_" + this.pos[i].X + "_" + this.pos[i].Y); 
if (obj) obj.className = "snake"; else { this.Over();/*移出邊界*/ break; } 
} 
this.isDone = true; 
}; 
/*游戲結(jié)束*/ 
this.Over = function () { 
clearInterval(Common.workThread); 
alert("游戲結(jié)束！"); 
} 
/*吃食物*/ 
this.Eat = function (food) { 
var head = this.pos[this.pos.length - 1]; 
var isEat = false; 
switch (this.dir) { 
case Direction.UP: 
if (head.X == food.pos.X && head.Y == food.pos.Y + 1) isEat = true; 
break; 
case Direction.RIGHT: 
if (head.Y == food.pos.Y && head.X == food.pos.X - 1) isEat = true; 
break; 
case Direction.DOWN: 
if (head.X == food.pos.X && head.Y == food.pos.Y - 1) isEat = true; 
break; 
case Direction.LEFT: 
if (head.Y == food.pos.Y && head.X == food.pos.X + 1) isEat = true; 
break; 
} 
if (isEat) { 
this.pos[this.pos.length] = new Position(food.pos.X, food.pos.Y); 
food.Create(this.pos); 
} 
}; 
/*控制移動方向*/ 
this.SetDir = function (dir) { 
switch (dir) { 
case Direction.UP: 
if (this.isDone && this.dir != Direction.DOWN) { this.dir = dir; this.isDone = false; } 
break; 
case Direction.RIGHT: 
if (this.isDone && this.dir != Direction.LEFT) { this.dir = dir; this.isDone = false; } 
break; 
case Direction.DOWN: 
if (this.isDone && this.dir != Direction.UP) { this.dir = dir; this.isDone = false; } 
break; 
case Direction.LEFT: 
if (this.isDone && this.dir != Direction.RIGHT) { this.dir = dir; this.isDone = false; } 
break; 
} 
}; 
} 
/*食物*/ 
function Food() { 
this.pos = new Position(); 
/*創(chuàng)建食物 - 隨機位置創(chuàng)建立*/ 
this.Create = function (pos) { 
document.getElementById("box_" + this.pos.X + "_" + this.pos.Y).className = ""; 
var x = 0, y = 0, isCover = false; 
/*排除蛇的位置*/ 
do { 
x = parseInt(Math.random() * (Common.width - 1)); 
y = parseInt(Math.random() * (Common.height - 1)); 
isCover = false; 
if (pos instanceof Array) { 
for (var i = 0; i < pos.length; i++) { 
if (x == pos[i].X && y == pos[i].Y) { 
isCover = true; 
break; 
} 
} 
} 
} while (isCover); 
this.pos = new Position(x, y); 
document.getElementById("box_" + x + "_" + y).className = "food"; 
}; 
} 
function Position(x, y) { 
this.X = 0; 
this.Y = 0; 
if (arguments.length >= 1) this.X = x; 
if (arguments.length >= 2) this.Y = y; 
} 
</script> 
</head> 
<body> 
<div id="pannel" style="margin-bottom: 10px;"></div> 
<select id="selSize"> 
<option value="20">20*20</option> 
<option value="30">30*30</option> 
<option value="40">40*40</option> 
</select> 
<select id="selSpeed"> 
<option value="500">速度-慢</option> 
<option value="250" selected="selected">速度-中</option> 
<option value="100">速度-快</option> 
</select> 
<input type="button" id="btnStart" value="開始" /> 
</body> 
</html> 