<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
#fbWrap {
width: 350px;
height: 480px;
background: url("img/bg.jpg");
background-size: 100% 100%;
position: relative;
overflow: hidden;
margin: 0 auto;
}
#head {
position: absolute;
left: 50px;
top: 150px;
}
#head span {
background: url("img/bird0.png");
position: absolute;
right: 0;
top: 20px;
width: 40px;
height: 26px;
background-size: 100% 100%;
}
#scoring {
position: absolute;
left: 50%;
top: 40px;
z-index: 2;
font-size: 50px;
}
#menu {
position: absolute;
left: 40%;
top: 60%;
}
#bird {
position: absolute;
left: 30px;
top: 10%;
display: none;
z-index: 10;
}
.die {
transition: 0.5s;
top: 393px !important;
z-index: 99;
}
#ductWrap li {
position: absolute;
top: 0;
left: 350px;
width: 62px;
height: 423px;
list-style: none;
}
.duct_up {
background: url("img/up_mod.png") repeat-y;
height: 120px;
position: relative;
}
.duct_up img {
position: absolute;
bottom: 0;
}
.duct_down {
background: url("img/down_mod.png") repeat-y;
height: 203px;
position: absolute;
bottom: 0;
width: 100%;
}
.duct_down img {
position: absolute;
top: 0;
}
</style>
</head>
<body>
<audio autoplay="autoplay" preload="auto"
src="game_music.mp3">
你的浏览器不支持audio标签
</audio>
<div id="fbWrap">
<div id="head" class="animated slideOutUp">
<img src="img/head.jpg" alt="">
<span></span>
</div>
<div id="scoring">
0
</div>
<div id="menu">
<img id="start" src="img/start.jpg" alt="">
</div>
<div id="bird">
<img src="img/down_bird1.png" alt="">
</div>
<ul id="ductWrap">
</ul>
</div>
</body>
<script type="text/javascript">
// 开始按钮
var startBtn = document.querySelector("#start");
// head
var head = document.querySelector("#head");
// bird
var bird = document.querySelector("#bird");
// audio
var audio = document.querySelector("audio");
// 获取存放管道的div
var ductWrap = document.querySelector("#ductWrap");
// 获取存放分数的div
var score = document.querySelector("#scoring");
// 创建管道定时器
var createDuctTimer = null;
// 是否删除管道移动定时器
var isDelTimer = false;
startBtn.onclick = function () {
// 隐藏开始按钮和head
this.parentNode.style.display = "none";
head.style.display = "none";
// 显示小鸟
bird.style.display = "block";
// 小鸟移动的速度
bird.speed = 0;
// 小鸟移动
bird.moveTimer = setInterval(function () {
bird.speed += 0.5;
if (bird.offsetTop <= 0) {
bird.style.top = "0px";
} else if (bird.offsetTop >= 394) {
bird.style.top = "394px";
clearInterval(bird.moveTimer);
audio.src = "game_over.mp3";
document.onmousedown = function (e) {
// 阻止默认事件
var ev = e || window.event;
ev.preventDefault();
};
// 当小鸟落地死亡时
// 1:清除创建管道的定时器
clearInterval(createDuctTimer);
// 2:清除管道移动的定时器
isDelTimer = true;
}
if (bird.speed <= 0) {
bird.children[0].src = "img/up_bird0.png";
} else {
bird.children[0].src = "img/down_bird0.png";
}
bird.style.top = bird.offsetTop + bird.speed + "px";
// 碰撞检测
var ductRow = document.querySelectorAll(".duct_row");
for (var i = 0; i < ductRow.length; i++) {
var isCrash = crashFn(bird, ductRow[i]);
if (isCrash == true) {
// 更换音乐
audio.src = "game_over.mp3";
// 清除小鸟移动
clearInterval(bird.moveTimer);
// 清除创建管道定时器
clearInterval(createDuctTimer);
// 清除管道移动
isDelTimer = true;
bird.className = "die";
document.onmousedown = function (e) {
var ev = e || window.event;
ev.preventDefault();
};
}
}
}, 30);
// 小鸟向上移动
document.onmousedown = function (e) {
// 阻止默认事件
var ev = e || window.event;
ev.preventDefault();
bird.speed = -5;
audio.src = "bullet.mp3";
}
// 创建管道
createDuctTimer = setInterval(function () {
var duct = document.createElement("li");
// 上管道的随机高度
var upHeight = randFn(62, 261);
// 下管道的高度
var downHeight = 423 - upHeight - 100;
duct.innerHTML = '<div class="duct_up duct_row" style="height:' + upHeight + 'px"><img src="img/up_pipe.png"></div><div class="duct_down duct_row" style="height: ' + downHeight + 'px"><img src="img/down_pipe.png"></div>';
// 管道第一次出现的位置
duct.l = 350;
// 给管道添加bol(用来判断是否加分)
duct.scoreBol = true;
// 管道移动
duct.moveTimer = setInterval(function () {
duct.l -= 3;
duct.style.left = duct.l + "px";
if (duct.l <= -62) {
// 清除管道
ductWrap.removeChild(duct);
clearInterval(duct.moveTimer);
} else if (duct.l <= -31) {//当管道小于-31时，代表小鸟通过
if (duct.scoreBol == true) {
score.innerHTML = parseInt(score.innerHTML) + 10;
}
duct.scoreBol = false;
}
// 小鸟死亡，定时器移除
if (isDelTimer == true) {
clearInterval(duct.moveTimer);
}
}, 30)
// 把管道插入到ductWrap
ductWrap.appendChild(duct);
}, 3000);
}
// 随机函数
function randFn(min, max) {
return parseInt(Math.random() * (max - min + 1) + min);
}
//碰撞检测
function crashFn(obj1, obj2) {
var obj1Left = obj1.offsetLeft;
var obj1Right = obj1Left + obj1.offsetWidth;
var obj1Top = obj1.offsetTop;
var obj1Bottom = obj1Top + obj1.offsetHeight;
var obj2Left = obj2.parentNode.offsetLeft;
var obj2Right = obj2Left + obj2.offsetWidth;
var obj2Top = obj2.offsetTop;
var obj2Bottom = obj2Top + obj2.offsetHeight;
// 1:obj1的右边 大于等于 obj2的左边
// 2:obj1的下边 大于等于 obj2的上边
// 3:obj1的左边 小于等于 obj2的右边
// 4:obj1的上边 小于等于 obj2的下边
if (obj1Right >= obj2Left && obj1Bottom >= obj2Top && obj1Left <= obj2Right && obj1Top <= obj2Bottom) {
// 已经发生碰撞
return true;
} else {
// 没有碰撞
return false;
}
}
</script>
</html>
原文章https://www.jianshu.com/p/9361a94df4da
转载仅供学习