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贪吃蛇游戏[原创]
悬赏分：20 - 2007年08月15日


CODE:
<html>
<body style='background-color:#d4d0c8'>
<script>
window.onload = initGame;
var snake;
var snakeLength = 3; //蛇的初始长度
var life = 3; //生命
var currentMession = 1; //初始关数
var datagrid = new Array();
var gridWidth = 11;
var gridHeight = 16;
var foodPerMession = 15; //每局要吃掉的食物数量
var posX;
var posY;
var grade = 0;
/////////////////////////////
var bgcolor = "#D9F6DC"; //背景色
var gridcolor = "#D9F6DC"; //网格颜色
var foodcolor = "#C44D85"; //食物颜色
var snakecolor = "#68A6F9"; //蛇的颜色
var gameRun;
var gameStatus;
var snakeDirection;
var direction = 40;
var st;
function initGame()
{
createEnvironment(11,16);
}
//-----------------------------
//-- 画表格,和游戏部件
function createEnvironment(width,height)
{
oGame = document.createElement("TABLE");
oD = oGame.insertRow().insertCell();
oD.id = "game";
oGame.align = "center";
document.body.appendChild(oGame);
for(var n=0;n<4;n++)
{
var gameInfo = document.createElement("DIV");
gameInfo.style.padding = "0px 5px 1px 5px";
gameInfo.id = "gameInfo".concat(n);
gameInfo.style.font = "11.5px Verdana,Tahoma";
gameInfo.style.pixelHeight = 16;
document.getElementById("game").appendChild(gameInfo);
}
oGrid = document.createElement("TABLE");
oGrid.cellPadding = 0;
oGrid.cellSpacing = 1;
oGrid.align = "center";
oGrid.style.border = "1px solid";
oGrid.style.borderColor= "#666666 #ffffff #ffffff #666666";
oGrid.bgColor = gridcolor;
for(var i = 0;i<height;i++)
{
var or = oGrid.insertRow();
or.style.backgroundColor=bgcolor;
var rows = new Array();
for(var c=0;c<width;c++)
{
var oc = or.insertCell();
oc.style.font="11.5px Verdana";
oc.style.pixelWidth = 15;
oc.style.pixelHeight = 15;
oc.setAttribute("position",i+":"+c);
rows.push(oc);
}
datagrid.push(rows);
}
document.getElementById("game").appendChild(oGrid);
startBnt = document.createElement("INPUT");
startBnt.type = "BUTTON";
startBnt.id = "startbutton";
startBnt.align = "center";
startBnt.style.width = "100px";
startBnt.value = "start";
startBnt.style.font ="bold 11.5px Verdana";
startBnt.attachEvent("onclick",startGame);
document.getElementById("game").appendChild(document.createElement("BR"));
document.getElementById("game").appendChild(startBnt);
startBnt.focus();
}
//游戏初始化,并进入游戏循环
function startGame()
{
clearTimeout(st);

for(var i=0;i<datagrid.length;i++)
{
for(var j=0;j<datagrid[i].length;j++)
{
datagrid[i][j].style.backgroundColor = bgcolor;
}
}
startbutton.disabled = true;
snake = new Array(snakeLength);
//////////////////////////////////////////////////////////////
posY = -1;
posX = (datagrid[0].length - 1) / 2;
grade = 0;
snakeDirection = direction = 40;
gameStatus = true;
document.getElementById("gameInfo0").innerHTML = "Mession: <B style='color:blue'>" + currentMession + "</B>";
document.getElementById("gameInfo1").innerHTML = "Game Score: <B style='color:"+foodcolor+"'>"+ grade +"</B>";
document.getElementById("gameInfo2").innerHTML = getLife(false);
document.getElementById("gameInfo3").innerHTML = "Game Status: <B>Ready.</B>";
alert("Mession "+currentMession);
addFood();
runGame();
}
//游戏暂停
function pause()
{
if(gameRun == false)return;
gameStatus = false;
document.getElementById("gameInfo3").innerHTML = "Game Status: <B>Pause.</B>";
}
//游戏暂停后,重新开始
function restart()
{ if(gameRun == false)return;
gameStatus = true;
document.getElementById("gameInfo3").innerHTML = "Game Status: <B>Starting.</B>";
}

//游戏循环
function runGame()
{
gameRun = true;
var foodEated = false;
if(!gameStatus)
{
setTimeout("runGame()",500);
return;
}
var oPosX = posX;
var oPosY = posY;

snakeDirection = direction;
switch(snakeDirection)
{
case 37: posX -= 1; break;
case 38: posY -= 1; break;
case 39: posX += 1; break;
case 40: posY += 1; break;
}

try
{

document.getElementById("gameInfo3").innerHTML =
"Game Status: <B>Starting.</B>";
if(datagrid[posY] == undefined||datagrid[posY][posX] == undefined)
{
throw false;
}
// 如果吃到的食物
if(datagrid[posY][posX].style.backgroundColor.toUpperCase() == foodcolor.toUpperCase())
{
document.getElementById("gameInfo1").innerHTML =
"Game Score: <B style='color:"+foodcolor+"'>"+(grade + 1)+"<B>";
if(++grade >= foodPerMession)
{
currentMession++;
gameRun = null;
document.getElementById("gameInfo3").innerHTML =
"Game Status: <B>Success!</B>";
startbutton.value = "Next Mession";
startbutton.disabled = false;
startbutton.focus();
}
else
{
foodEated = true;

}
}
else
{
try
{ //弹出尾巴
snake.shift().style.backgroundColor = bgcolor;
}
catch(ex)
{}
}

if(datagrid[posY][posX].style.backgroundColor.toUpperCase() == snakecolor.toUpperCase())
{
throw false;
}
datagrid[posY][posX].style.backgroundColor = snakecolor;
snake.push(datagrid[posY][posX]);
if(foodEated)addFood();
}
catch(ex)
{
gameRun = ex;
}
finally
{
if(gameRun == true)
{
stime = 120 - (5 * currentMession);
if(stime < 30)stime = 30;
st = setTimeout("runGame()",stime);

}
else
{
if(gameRun == false)
{
document.getElementById("gameInfo2").innerHTML = getLife(true);
if(--life <= 0)
{
life = 3;
currentMession = 1;
document.getElementById("gameInfo3").innerHTML = "Game Status: <B>Game Over.</B>";
startbutton.value = "Start";
alert("Game Over.");
}
else
{
document.getElementById("gameInfo3").innerHTML = "Game Status: <B>Game Failed.</B>";
startbutton.value = "Continue";
}

startbutton.disabled = false;
startbutton.focus();
}
}
}
}
//在游戏面上添加一个食物
function addFood()
{
x = Math.floor(gridWidth * Math.random());
y = Math.floor(gridHeight * Math.random());
while(datagrid[y][x].style.backgroundColor.toUpperCase() == snakecolor.toUpperCase())
{
x = Math.floor(gridWidth * Math.random());
y = Math.floor(gridHeight * Math.random());
}

datagrid[y][x].style.backgroundColor = foodcolor;
}
//返回玩家的游戏次数
function getLife(boolValue)
{
var lifeInfo = "Life: <b style='color:"+snakecolor+"'>";
l=(boolValue)? 1:0;
for(;l<life;l++)
{
lifeInfo += "■";
}
lifeInfo +="</B>";
return lifeInfo;
}

function document.onkeydown()
{
switch (event.keyCode)
{
case 37:
if(snakeDirection != 39)direction = 37;
break;
case 38:
if(snakeDirection != 40)direction = 38;
break;
case 39:
if(snakeDirection != 37)direction = 39;
break;
case 40:
if(snakeDirection != 38)direction = 40;
break;
case 19: // 小键盘的Pause键
if(gameStatus)pause();else restart();
break;
default:break;
}
}
/*
1判定是否在范围内
|
\ no------------>异常
^
2判定是否吃到东西 |
/\ |
/ \ |
yes/ \ no |
>规定数量? 弹出尾巴 |
| |
yes/ \ no |
next addFood() |
mession |
|
3判断是否为蛇的颜色 |
| |
\yes__________________
*/
</script>
</body>
</html>

提问者：longhorn   08-15 09:09
答复
路过。。。顺便帮顶:)
回答者：玉米づ冰冻可乐 - 瓦岗村民 8-22 09:10
我也来回答：
不管你有没有帮助我们，瓦岗寨8万村民将感谢你。。。。。

为防止灌水，您需要计算一道数学题： 答案：
41 + 94 = ? 请将计算结果填在上面

 
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