JavaScript与html5写的贪吃蛇完整代码
查看运行效果可访问http://www.codesocang.com/texiao/youxitexiao/2014/0402/7045.html#
<!doctype html>
<html lang="en">
<head>
<meta
charset="utf-8">
<title>js网页版的贪吃蛇游戏</title>
<style
type="text/css">
#container{
width: 1000px;
margin: 0
auto;
}
#ground{
position: relative;
width: 1000px;
height:
500px;
background: #e6df6d;
}
#control{
width: 998px;
height:
60px;
line-height: 60px;
background:
#cce290;
}
#banner{
float: left;
margin-left: 10px;
font: bold
18px;
}
#buttons{
float: right;
margin-right:
10px;
}
ul#speed{
float: left;
margin: 10px auto;
height:
40px;
line-height: 40px;
list-style: none;
text-align:
center;
}
#speed li{
cursor: pointer;
background:
#f6ff9f;
float: left;
width: 60px;
height: 100%;
margin-right:
12px;
border-radius: 30px;
}
#intro{
height: 50px;
width:
100%;
position: relative;
background:#cce290
url(http://www.codefans.net/jscss/demoimg/201403//key.jpg)
no-repeat;
}
#intro h4 {
float: left;
text-indent:
220px;
}
#intro p{
width: 600px;
position: absolute;
top:
-10px;
left: 320px;
line-height: 20px;
}
.food{
position:
absolute;
background: #8b0
url(http://www.codefans.net/jscss/demoimg/201403//body.gif);
}
.block{
float:
left;
width: 20px;
height: 20px;
overflow:
hidden;
}
.snake-block{
position: absolute;
background:
red;
}
#h-down,#t-down{
transform: rotate(90deg);
-ms-transform:
rotate(90deg);/* IE 9 */
-webkit-transform: rotate(90deg);/* Safari and
Chrome */
-o-transform: rotate(90deg);/* Opera */
-moz-transform:
rotate(90deg);/* Firefox */
}
#h-up,#t-up{
transform:
rotate(-90deg);
-ms-transform: rotate(-90deg);/* IE 9
*/
-webkit-transform: rotate(-90deg);/* Safari and Chrome
*/
-o-transform: rotate(-90deg);/* Opera */
-moz-transform: rotate(-
90deg);/* Firefox */
}
#h-left,#t-left{
transform:
rotate(180deg);
-ms-transform: rotate(180deg);/* IE 9
*/
-webkit-transform: rotate(180deg);/* Safari and Chrome
*/
-o-transform: rotate(180deg);/* Opera */
-moz-transform:
rotate(180deg);/* Firefox
*/
}
</style>
</head>
<body>
<div
id="container">
<div id="ground">
</div>
<div
id="control">
<span id="banner">JavaScript sneaker by
王洁</span>
<ul id="speed">
<li
>一级</li>
<li >二级</li>
<li
>三级</li>
<li id="sub-v">减速</li>
<li
id="add-v">加速</li>
</ul>
<span></span>
<div
id="buttons">
<button
id="start">开始</buutton>
<button
id="purse">暂停</button>
</div>
</div>
<div
id="intro">
<h4>游戏说明：</h4>
<p>上下左右键控制蛇的转向，当吃的食物达到一定数量计数值加倍，当吃到类蛇身的食物时蛇身剪短但计数仍增加
</p>
</div>
</div>
<script
type="text/javascript">
var oGround =
document.getElementById(‘ground‘);
var oControl =
document.getElementById(‘control‘);
var aSpan =
oControl.getElementsByTagName(‘span‘);
var oSubDiv =
createDiv();
oSubDiv.style.display =
"none";
oGround.appendChild(oSubDiv);
//创建蛇
var aSnaker =
[];
for(var i=3;i>0; i--){
var oDiv =
document.createElement(‘div‘);
oDiv.style.left =
i*20+‘px‘;
oDiv.style.top = ‘60px‘;
oDiv.className = "block
snake-block";
if(i==3)
oDiv.style.background =
"url(/jscss/demoimg/201403//head.png)";
else
if(i==2)
oDiv.style.background =
"url(http://www.codefans.net/jscss/demoimg/201403//body.png)";
else
oDiv.style.background
=
"url(http://www.codefans.net/jscss/demoimg/201403//tail.png)";
//oDiv.innerHTML
= 4-i;
aSnaker.push(oDiv);
oGround.appendChild(oDiv);
}
var
oFood;
function divPos(){
var iLeft,iTop;
var flag =
false;
do{
iLeft = parseInt(Math.random()*50)*20+‘px‘;
iTop =
parseInt(Math.random()*25)*20+‘px‘;
for(var
i=0;i<aSnaker.length;i++){
if(iLeft==aSnaker[i].style.left &&
iTop==aSnaker[i].style.top){
flag =
true;
break;
}
}
}while(flag)
return
{iLeft:iLeft,iTop:iTop};
}
function createFood(){//创建食物
oFood =
document.createElement(‘div‘);
oFood.style.left =
divPos().iLeft;
oFood.style.top = divPos().iTop;
oFood.className =
‘block
food‘;
oGround.appendChild(oFood);
}
createFood();
function
createDiv(){
var oDiv = document.createElement("div");
oDiv.className
= "block";
oDiv.style.background =
"url(http://www.codefans.net/jscss/demoimg/201403//body.png)";
oDiv.style.position
= "absolute";
return oDiv;
}
function
addDiv(tailTop,tailLeft){
var oDiv = createDiv();
oDiv.style.top =
tailTop +"px";
oDiv.style.left =
tailLeft+"px";
oGround.appendChild(oDiv);
aSnaker.splice(aSnaker.length-1,0,oDiv);
}
//食物添加到尾巴的前面后计算尾巴现在应有的坐标
function
priTail(headLeft,headTop,tailLeft,tailTop,moveDir){
// console.log(tailLeft+‘,‘+tailTop+‘,‘+headLeft+‘,‘+headTop);
if(tailLeft
== headLeft||moveDir=="right" ||
moveDir=="left"){
if(tailTop>headTop)
tailTop -=
20;
else if(tailTop<headTop)
tailTop +=
20;
// console.log(tailLeft+‘,‘+tailTop+‘,‘+headLeft+‘,‘+headTop);
}else
if(tailTop == headTop||moveDir=="up" || moveDir=="down"){
if(tailLeft
>headLeft)
tailLeft -= 20;
else
if(tailLeft>headLeft)
tailLeft +=
20;
// console.log(tailLeft+‘,‘+tailTop+‘,‘+headLeft+‘,‘+headTop);
}
return
{tailTop:
tailTop,
tailLeft:tailLeft};
}
//食物达到一定数量吃到SubDiv就减去一段身体，但计数值仍增长
function
subDiv(){
}
var sum = 0;//对吃的食物数计数
var moveDir =
‘right‘;
function move(){
//蛇身整体移动
for(var
i=aSnaker.length-1;i>0;i--){
aSnaker[i].style.left =
aSnaker[i-1].style.left;
aSnaker[i].style.top =
aSnaker[i-1].style.top;
//console.log(i+‘,‘+aSnaker[i].style.left+‘,‘+aSnaker[i].style.top);
}
var
snakeHead = aSnaker[0];
var headLeft =
parseInt(snakeHead.style.left);
var headTop =
parseInt(snakeHead.style.top);
switch(moveDir){
case
"left":
headLeft -= 20;
break;
case "right":
headLeft
+= 20;
break;
case "up":
headTop -=
20;
break;
case "down":
headTop +=
20;
break;
}
snakeHead.style.left =
headLeft+‘px‘;
snakeHead.style.top = headTop+‘px‘;
aSnaker[0].id =
"h-"+moveDir;
//与蛇身相撞结束游戏
for(var
i=1;i<aSnaker.length;i++){
if(snakeHead.style.left==aSnaker[i].style.left
&&
snakeHead.style.top==aSnaker[i].style.top){
reStart();
}
}
//撞墙游戏结束
if(snakeHead.style.left
< "0px"|| snakeHead.style.top < "0px" || snakeHead.style.top== "500px" ||
snakeHead.style.left == "1000px"){
reStart();
}
var snakeTail =
aSnaker[aSnaker.length-1];//获取当前的尾巴
//尾巴的转向，根据前一个的位置设置方向
if(snakeTail.style.top<aSnaker[aSnaker.length-2].style.top)
snakeTail.id
= "t-down";
else
if(snakeTail.style.top>aSnaker[aSnaker.length-2].style.top)
snakeTail.id
=
"t-up";
if(snakeTail.style.left>aSnaker[aSnaker.length-2].style.left)
snakeTail.id
= "t-left";
else if
(snakeTail.style.left<aSnaker[aSnaker.length-2].style.left)
snakeTail.id
= "";
var tailLeft = parseInt(snakeTail.style.left);
var tailTop =
parseInt(snakeTail.style.top);
//食物达到一定数量吃到SubDiv就减去一段身体，但计数值仍增长
var
random = parseInt(Math.random()*8);
if(random==6 && sum>50
&& oSubDiv.style.display=="none"){
oSubDiv.style.display =
"block";
oSubDiv.style.left = divPos().iLeft;
oSubDiv.style.top =
divPos().iTop;
//if(oSubDiv){
if(snakeHead.style.left ==
oSubDiv.style.left && snakeHead.style.top ==
oSubDiv.style.top){
console.log(aSnaker.length);
snakeTail.style.left
= aSnaker[aSnaker.length-2].style.left;
snakeTail.style.top =
aSnaker[aSnaker.length-2].style.top;
aSnaker.splice(aSnaker.length-3,aSnaker.length-2);
oSubDiv.style.display
= "none";
console.log(aSnaker.length);
}
var
t=setTimeout(‘oSubDiv.style.display="none"‘,5000);
//sum++;
}
//吃到的食物添加到尾巴的前面，分别改变尾巴和食物的定位坐标值
if(snakeHead.style.left
== oFood.style.left && snakeHead.style.top ==
oFood.style.top){
tailLeft = snakeTail.style.left;
tailTop =
snakeTail.style.top;
oFood.style.background =
"url(http://www.codefans.net/jscss/demoimg/201403//body.png)";
oFood.style.top
= tailTop +"px";
oFood.style.left =
tailLeft+"px";
sum++;
aSnaker.splice(aSnaker.length-1,0,oFood);
tailTop
= priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailTop;
tailLeft =
priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailLeft;
if(sum>10&&sum<20){//食物达到一定数量有奖励
addDiv(tailTop,tailLeft);
sum++;
}
tailTop
= priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailTop;
tailLeft =
priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailLeft;
if(sum>20&&sum<40){//继续奖励，不过吃的太多也会死的更快
addDiv(tailTop,tailLeft);
sum++;
}
aSpan[1].innerHTML
= "已吃食物"+sum+"个";
tailTop =
priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailTop;
tailLeft =
priTail(headLeft,headTop,tailLeft,tailTop,moveDir).tailLeft;
snakeTail.style.left
= tailLeft+‘px‘;
snakeTail.style.top =
tailTop+‘px‘;
createFood();
}
}
var timer;
var timerFlag
= true;
var oStart = document.getElementById(‘start‘);
oStart.onclick =
function(){
if((timerFlag&&oStart.innerHTML !=
"结束")||oPurse.innerHTML=="恢复"){
oStart.innerHTML =
"结束";
openTimer();
timerFlag = false;
}
else
if(this.innerHTML
=="结束"){
clearInterval(timer);
//reStart();
}
};
var
oPurse = document.getElementById(‘purse‘);
oPurse.onclick =
function(){
if(!timerFlag&&this.innerHTML!="恢复"&&oStart.innerHTML=="结束"){
this.innerHTML
= "恢复";
clearInterval(timer);
timerFlag
=!timerFlag;
}else{
oStart.onclick();
this.innerHTML =
"暂停";
timerFlag = !timerFlag;
}
};
var perTime =
300;
function openTimer(){
timer =
setInterval(function(){//定时器
move();
//alert(oStart.innerHTML);
},
perTime);
}
//设置时间间隔，以改变速度
var oSpeed =
document.getElementById(‘speed‘);
var aLi =
oSpeed.getElementsByTagName(‘li‘);
for(var
i=0;i<aLi.length;i++){//通过改变perTimer
改变时间
(function(index){
if(index<3){
aLi[index].onclick =
function(){
clearInterval(timer);
switch (index){
case
0:
perTime = 400;
break;
case 1:
perTime =
200;
break;
case 2:
perTime =
60;
break;
}
if(oStart.innerHTML=="结束")
openTimer();
};
}
else
if(index==3){
aLi[index].onclick =
function(){
clearInterval(timer);
if(perTime>=50){
perTime
+=
50;
}
if(oStart.innerHTML=="结束")
openTimer();
};
}
else
if(index == 4){
aLi[index].onclick =
function(){
clearInterval(timer);
if (perTime<1000)
{
perTime
-=50;
}
if(oStart.innerHTML=="结束")
openTimer();
};
}
}
)(i);
}
function
reStart(){//重新开始
clearInterval(timer);
var msg =
confirm("此次游戏失败，要重新开始吗？");
//alert("Game
Over");
if(msg)
window.location.reload();
}
document.onkeydown
= function(e){//设置转向
e = e||window.event;
var keyCode = e.which ||
e.keyCode;
switch (keyCode){
case
37:
if(moveDir!="right"){
moveDir =
"left";
}
break;
case
38:
if(moveDir!="down"){
moveDir =
"up";
}
break;
case
39:
if(moveDir!="left"){
moveDir =
"right";
}
break;
case
40:
if(moveDir!="up"){
moveDir =
"down";
}
break;
}
}
</script>
<div
style="text-align:center;margin:50px 0; font:normal 14px/24px ‘MicroSoft
YaHei‘;">
</div>
</body>
</html>