使用html+css+js实现弹球游戏
代码如下，复制即可使用：
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<!doctype html>
<head>
<style type="text/css">
.panel{
position: relative;
z-index: 0;
top:0px;
left: 400px;
width: 300px;
height: 500px;
}
.console{
position: absolute;
z-index: 1;
top:0;
left:0;
width:100%;
height: 40px;
background-color: #bbb;
}
.message{
position: absolute;
z-index: 1;
top:40px;
left:0;
width:100%;
height: 460px;
color: white;
font-size: 50px;
text-align: center;
line-height: 460px;
background-color: #999;
}
.start,.score,.pause{
position: absolute;
z-index: 2;
top: 0;
width: 100px;
height: 100%;
font-size: large;
color: white;
text-align: center;
line-height: 40px;
background: -webkit-linear-gradient(top,#4ca8ff,yellow);
}
.start{
left: 0px;
}
.score{
left:100px;
background-color: red;
}
.pause{
left:200px;
}
.start:after,.pause:before{
content: "";
position: absolute;
z-index: 2;
top: 0;
width: 3px;
height: 100%;
background: -webkit-linear-gradient(top,#666,#999);
}
.start:after{
left: 97px;
}
.pause:before{
left: 0px;
}
.start:hover,.pause:hover{
cursor: pointer;
background: -webkit-linear-gradient(top,#4ca8ff,red);
}
.panel span{
position: absolute;
z-index: 0;
top:50%;
left: 50%;
font-size: 50px;
color: blue;
}
.ball,.secondBall{
position:absolute;
z-index: 2;
border-radius:50%;
width: 20px;
height: 20px;
}
.ball{
top: 460px;
left:140px;
background-color: red;
}
.secondBall{
top: 40px;
left:140px;
background-color: red;
}
.plate{
position: absolute;
top:480px;
left: 100px;
z-index: 2;
width: 100px;
height: 20px;
background-color: #e5e5e5;
}
.promte{
margin-top: 20px;
text-align: center;
}
</style>
</head>
<body>
<div id="panel" class="panel">
<div class="console">
<div id="start" class="start">开始</div>
<div id="score" class="score">0</div>
<div id="pause" class="pause">暂停</div>
</div>
<div id="message" class="message"></div>
<div id="ball" class="ball"></div>
<div id="plate" class="plate"></div>
</div>
<div class="promte">提示：键盘左右箭头控制滑板</div>
<script type="text/javascript">
(function(){
document.onkeydown = function(e){
var e = e || window.event;
if(e.keyCode == 37){
//键盘向左键
plateMove("left");
}else if(e.keyCode == 39){
//键盘向右键
plateMove("right");
}
}
})();
var panel = document.getElementById("panel"),
message = document.getElementById("message"),
plate = document.getElementById("plate"),
ball = document.getElementById("ball"),
start = document.getElementById("start"),
score = document.getElementById("score"),
pause = document.getElementById("pause"),
secondBall;
var startGame, x = x2 = -1, y = y2 = -1, speed = 1, positionArr = [], pauseActive = false,
//一个标志：表示难度是否还能增加
flag = true,
//球的起始位置
ballX, ballY, secondBallX, secondBallY,
//边界
minX = 0,
maxX = panel.offsetWidth - ball.offsetWidth,
minY = 40;
maxY = panel.offsetHeight - ball.offsetHeight - plate.offsetHeight;
window.onload = function(){
if(window.addEventListener){
start.addEventListener("click",startClick,false);
pause.addEventListener("click",pauseClick,false);
}else if(window.attachEvent){
start.attachEvent("onclik",startClick);
pause.attachEvent("onclik",pauseClick);
}else{
start.onclik = startClick;
pause.onclik = pauseClick;
}
}
function plateMove(direction){
if(direction == "left"){
if(plate.offsetLeft > 0){
plate.style.left = (plate.offsetLeft-30 < 0? 0 : plate.offsetLeft-30)+"px";
}
}
if(direction == "right"){
if(plate.offsetLeft < 200){
plate.style.left = (plate.offsetLeft+30 > 200? 200 : plate.offsetLeft+30)+"px";
}
}
}
function startClick(){
if(!pauseActive){
resetGame();
}else{
pauseActive = !pauseActive;
}
startGame = setInterval(function(){
//console.log(ballX+"======"+ballY);
positionArr = setPosition(ballX,ballY,true);
if(positionArr == "GAMEOVER"){
return;
}
ballX = positionArr[0];
ballY = positionArr[1];
//设置球的位置
ball.style.left = ballX+"px";
ball.style.top = ballY+"px";
if(!flag){
positionArr = setPosition(secondBallX,secondBallY,false);
secondBallX = positionArr[0];
secondBallY = positionArr[1];
secondBall.style.left = secondBallX+"px";
secondBall.style.top = secondBallY+"px";
}else{
addDifficulty();
}
},30);
}
function pauseClick(){
pauseActive = true;
clearInterval(startGame);
}
function resetGame(){
clearInterval(startGame);
message.innerHTML="";
score.innerHTML="0";
ball.style.left = "140px";
ball.style.top = "460px";
plate.style.left = "100px";
plate.style.top = "480px";
ballX = ball.offsetLeft;
ballY = ball.offsetTop;
speed = 1;
flag = true;
//第二个球设置隐藏
if(secondBall){
secondBall.style.display="none";
secondBall.style.left = "140px";
secondBall.style.top = "40px";
}
}
function addDifficulty(){
if(parseInt(score.innerHTML) > 500 && parseInt(score.innerHTML) < 2000){
speed = 1.2;
}else if(parseInt(score.innerHTML) > 2000 && parseInt(score.innerHTML) < 5000){
speed = 1.5;
}else if(parseInt(score.innerHTML) > 5000){
if(typeof secondBall != "undefined"){
secondBall.style.display="";
}else{
secondBall = document.createElement('div');
}
secondBall.className = 'secondBall';
panel.appendChild(secondBall);
secondBallX = secondBall.offsetLeft;
secondBallY = secondBall.offsetTop;
flag = false;
}
}
function setPosition(_x,_y,firstball){
if(_x == minX || _x == maxX){
//x*=-1;
firstball? x*=-1 : x2*=-1;
}
if(_y == minY || _y == maxY){
//y*=-1;
firstball? y*=-1 : y2*=-1;
}
if(_y == maxY){
//判断挡板的位置是不是在球的范围内
if(plate.offsetLeft > _x || (plate.offsetLeft + plate.offsetWidth) < _x){
clearInterval(startGame);
message.innerHTML="GAMEOVER";
return "GAMEOVER";
}
}
if(firstball){
_x+=4*x*speed;
_y+=5*y*speed;
}else{
_x+=4*x2*speed;
_y+=5*y2*speed;
}
//边界处理
_x = _x < minX? minX : _x;
_x = _x > maxX? maxX : _x;
_y = _y < minY? minY : _y;
_y = _y > maxY? maxY : _y;
//设置分数
score.innerHTML=parseInt(score.innerHTML)+10*speed;
return [_x,_y];
}
</script>
</body>
</html>
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