以下是 js网页版的贪吃蛇游戏特效代码 的示例演示效果:
部分效果截图1:
部分效果截图2:
HTML代码(index.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(img/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(img/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(img/head.png)";
else if(i==2)
oDiv.style.background = "url(img/body.png)";
else
oDiv.style.background = "url(img/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(img/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(img/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>
</body>
</html>
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