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原生js html5 canvas制作flappy bird压扁小鸟游戏

可以以电脑浏览器的手机模式打开,也可以在手机浏览器中直接打开

游戏运用了Canvas的drawImage,translate,rotate,save,restore,fillRect等API。 采用中介者模式,Game类统领全局,负责读取资源,设置定时器,维护各个物体实例,所有的演员都是Game类new 出来的, 游戏项目外部的语句就一条:

  • 碰撞检测

因此小鸟的图片其实是一个长方形,而且角度又不断变化导致中心点难于掌握,因此很难判断小鸟与管子的碰撞。 这里画了张图帮助自己理解

  • 小鸟下落的速度

需要模拟小鸟的重力,高中物理没有白学

  • 分数的计算

分数的计算与碰撞检测类似,设置一个开关,当管子重新出现时,设置为true。当分值加1时,设置为false。小鸟的最左边的x坐标如果超出了管子的x+width,就认为成功通过。

  • 场景管理器

场景管理器有4个方法enter,update,render,bindEvent。其中定时器在每帧执行update方法和render方法。enter方法由业务来调用,比如用户点击了按钮,此时就进入场景2,鸟撞到了管子,就进入场景3。 这样就把游戏的各个不同阶段分离出来,方便处理。

演示下载地址:https://www.erdangjiade.com/js/7968.html

源码实例如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>flappy bird压扁小鸟小游戏</title><meta property="og:type" content="website">
<meta property="og:title" content="Squishy Bird">
<meta property="og:site_name" content="Squishy Birds">
<meta property="og:image" content="src/wav/fbthumb.jpg">
<meta name="viewport" content="user-scalable=no, initial-scale=0.5, width=610, height=1024"><link rel="image_src" href="src/wav/fbthumb.jpg"></head>
<body style="margin: 0px; overflow: hidden;-moz-user-select: none;-webkit-user-select: none;user-select: none;"  ><div id="lgd" style="width: 300px; height: 64px; position: absolute; left: 533px; top: 301px; font-family: Verdana; font-size: 16px; font-weight: bold; text-align: center;">Loading...</div><script type="text/javascript" src="src/squishybird.js"></script><div style="overflow: hidden; position: relative; width: 1366px; height: 620px;"><canvas width="1366" height="620"></canvas><img src="src/wav/pipe1.png" width="148" height="1664" style="position: absolute; left: 609px; top: -1533px; z-index: 420;"><img src="src/wav/pipe2.png" width="148" height="1664" style="position: absolute; left: 609px; top: 400.9999999999999px; z-index: 420;"><canvas width="1366" height="88" style="position: absolute; z-index: 31337; left: 0px; top: 532px;"></canvas><canvas width="1366" height="256" style="position: absolute; z-index: 60; left: 0px; top: 276px;"></canvas><canvas width="1366" height="216" style="position: absolute; z-index: 61; left: 0px; top: 316px;"></canvas><img src="src/wav/logo.png" style="position: absolute; opacity: 0; z-index: 42069; left: 370px; top: 174px; display: none;"><img src="src/wav/gameover.png" style="position: absolute; opacity: 1; z-index: 42069; left: 370px; top: 93px; display: inline;"><img src="src/wav/clicktostart.png" style="position: absolute; opacity: 0; z-index: 42070; left: 514px; top: 435px; display: none;"><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 536px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 535px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 534px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(255, 255, 255); z-index: 88888; -webkit-user-select: none; left: 533px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 533px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 532px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 531px; top: 17px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 23px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 22px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 21px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 20px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 19px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 18px;">0</div><div style="width: 300px; height: 50px; position: absolute; text-align: center; font-family: Verdana; font-weight: bold; font-size: 30px; color: rgb(0, 0, 0); z-index: 88887; -webkit-user-select: none; left: 530px; top: 17px;">0</div><canvas width="150" height="150" style="z-index: 69; position: absolute; left: 880.7973799593747px; top: 288.1699138371274px;"></canvas><canvas width="150" height="150" style="z-index: 69; position: absolute; left: 94.18296936130267px; top: 175.22475277371694px;"></canvas><canvas width="150" height="150" style="z-index: 69; position: absolute; left: 147.39346598794316px; top: 196.6628938429057px;"></canvas><canvas width="150" height="150" style="z-index: 69; position: absolute; left: -235.79706690685066px; top: -486.7269952782424px;"></canvas>
</div><audio src="src/wav/flap.wav"></audio>
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