javascript 탐식 뱀 구현 코드

// JavaScript Document 
alert("          ，     。
LIFE  
http://blog.csdn.net/anhulife"); 
//         ， 160 10 * 10          
var rowindex = new Array(40); 
var colindex; 
var cell; 
//         
var backcolor = "black"; 
for(var i = 0; i < 40; i ++ ) 
{ 
colindex = new Array(40); 
for(var j = 0; j < 40; j ++ ) 
{ 
//           
cell = document.createElement("div"); 
cell.style.backgroundColor = backcolor; 
cell.style.width = "10px"; 
cell.style.height = "10px"; 
cell.style.position = "absolute"; 
cell.style.left = "" + (j * 10 + 100) + "px"; 
cell.style.top = "" + (i * 10 + 100) + "px"; 
cell.style.overflow = "hidden"; 
//      
document.body.appendChild(cell); 
//      
colindex[j] = cell; 
} 
//      
rowindex[i] = colindex; 
} 
//        ，          
function snake() 
{ 
//       ，     
this.bodycolor = "white"; 
this.bodys = new Array(); 
for(var i = 20; i < 25; i ++ ) 
{ 
rowindex[20][i].style.backgroundColor = this.bodycolor; 
// rowindex         ，      
this.bodys.push(rowindex[20][i]); 
} 
//         ，      ,        
this.head = [20, 20]; 
//         ，0   、1   、2   、3    
this.direct = 0; 
} 
//      
function move() 
{ 
//               
switch(this.direct) 
{ 
case 0 : 
this.head[1] -= 1; 
break; 
case 1 : 
this.head[0] += 1; 
break; 
case 2 : 
this.head[1] += 1; 
break; 
case 3 : 
this.head[0] -= 1; 
break; 
} 
//        
if(this.head[0] < 0 || this.head[0] > 39 || this.head[1] < 0 || this.head[1] > 39) 
{ 
//        false 
return false; 
} 
else 
//                  ，        ，      。         false 
if(this.head[0] == food[0] && this.head[1] == food[1]) 
{ 
//       
rowindex[this.head[0]][this.head[1]].style.backgroundColor = this.bodycolor; 
this.bodys.unshift(rowindex[this.head[0]][this.head[1]]); 
score++; 
makefood(); 
return true; 
} 
else 
//        
if(rowindex[this.head[0]][this.head[1]].style.backgroundColor == this.bodycolor) 
{ 
if(rowindex[this.head[0]][this.head[1]] == this.bodys.pop())//         
{ 
this.bodys.unshift(rowindex[this.head[0]][this.head[1]]); 
return true; 
} 
//        
return false; 
} 
//         
this.bodys.pop().style.backgroundColor = backcolor; 
rowindex[this.head[0]][this.head[1]].style.backgroundColor = this.bodycolor; 
this.bodys.unshift(rowindex[this.head[0]][this.head[1]]); 
return true; 
} 
snake.prototype.move = move; 
//        
var foodcolor = "blue"; 
var food = [20, 17]; 
rowindex[food[0]][food[1]].style.backgroundColor = foodcolor; 
function makefood() 
{ 
var tempfood; 
var tempelement; 
out : 
while(true) 
{ 
tempfood = [Math.round(Math.random() * 39), Math.round(Math.random() * 39)]; 
tempelement = rowindex[tempfood[0]][tempfood[1]]; 
for(var i in s.bodys) 
{ 
if(s.bodys[i] == tempelement) 
{ 
//                ，      
continue out; 
} 
//        
break out; 
} 
} 
food = tempfood; 
rowindex[food[0]][food[1]].style.backgroundColor = foodcolor; 
} 
//           
document.onkeydown = turnorstop; 
function turnorstop(event) 
{ 
if(window.event != undefined) 
{ 
if(parseInt(window.event.keyCode)==32) 
{ 
alert("    "); 
} 
else 
{ 
switch(parseInt(window.event.keyCode)) 
{ 
case 37 : 
if(s.direct!=2) 
s.direct = 0; 
break; 
case 38 : 
if(s.direct!=1) 
s.direct = 3; 
break; 
case 39 : 
if(s.direct!=0) 
s.direct = 2; 
break; 
case 40 : 
if(s.direct!=3) 
s.direct = 1; 
break; 
} 
} 
} 
else 
{ 
if(parseInt(event.which)==32) 
{ 
alert("    "); 
} 
else 
{ 
switch(parseInt(event.which)) 
{ 
case 37 : 
if(s.direct!=2) 
s.direct = 0; 
break; 
case 38 : 
if(s.direct!=1) 
s.direct = 3; 
break; 
case 39 : 
if(s.direct!=0) 
s.direct = 2; 
break; 
case 40 : 
if(s.direct!=3) 
s.direct = 1; 
break; 
} 
} 
} 
} 
//        
var s = new snake(); 
var time = 60;//       
function startmove() 
{ 
if(s.move()) 
{ 
setTimeout(startmove, time); 
} 
else 
{ 
alert("GAME OVER
     :"+score+" "); 
} 
} 
//     
var score = -1; 
//     
startmove();