一直想用canvas写一个魂斗罗游戏,但是发现自己水平和学习能力差太多,收集好素材之后发现一个棍子英雄的小游戏挺火,就产生了写本文这个游戏的想法。直接上demo,建议在Chrome下:点我。
简单说下写这个小游戏遇到的2个坑爹问题:
1.之前下的素材music.mp3这个文件,其实是3段音频。最后几秒是魂斗罗结束时的音乐,我想在结束的时候直接从调用最后几秒的音频。查了一下audio,很容易找到了audio的currentTime这个属性可以设置音频的播放位置。但是我本地测试的过程中,这个属性是一直不起作用的。后来百度(百度根本不好用),谷歌了半天才在stackoverflow上找到了一段描述,大概的意思就是需要一个sever环境,然后把测试环境放到了服务器环境就可以正常使用currentTime这个属性设置音频的播放起始位置了,一个大坑。
2.第二个大坑平时写transition的时候习惯的将transition-PRoperty写为all。比如transition:all 0s ease 0s;。在这个游戏中,当鼠标松开的时候棍子应该是以100% 100%的位置为远点进行旋转的。由于我写的是all,所以transfor-origin也产生了一个从默认的50% 50%到100% 100%的一个过渡过程,反应在页面上就是棍子开始明显转动的远点不是100% 100%的位置,但是动画完成到100%的时候原点是正确的。
剩下的就是逻辑实现,本来是想做到自适应和重置游戏的,最后多少都有点不足,重置游戏直接用刷新页面的暴力方式来解决了。页面有很多bug,不行就刷一次,哈哈。
直接上代码:
html部分:
<!DOCTYPE html><html><head lang="en"> <meta charset="UTF-8"> <title>Child'sPlay</title> <link href="style/style.CSS" rel="stylesheet" type="text/css"/></head><body><div class="main" id="main"> <div id="score">当前得分<i class="current">0</i>分;最高得分<i class="top">0</i>分</div> <div class="bg"> <div class="move" id="move"> <div class="game-box" id="game_box"> <div class="contra" id="contra"></div> <div class="item" style="left: 0;"> <div class="land"><div class="stick" id="stick"></div> </div> </div> </div> </div> </div></div><div class="loading"> <progress id="progress" value="0" max="8"></progress> <h3>游戏方法:按住鼠标让棍子变长,使其放下的时候正好落入下一块陆地时放开鼠标。</h3></div><div class="begin"> <h3><i>点</i><i>击</i><i>键</i><i>盘</i><i>J</i><i>开</i><i>始</i><i>游</i><i>戏</i></h3></div><audio id="audio"> <source src="audio/start.mp3" type="audio/mpeg"/></audio><audio id="audio2"> <source src="audio/music.mp3" type="audio/mpeg"/></audio><audio id="audio3"> <source src="audio/Game_Over.mp3" type="audio/mpeg"/></audio><script src="js/jquery-1.11.1.min.js"></script><script src="js/contra.js"></script><script src="js/source.js"></script><script src="js/record.js"></script></body></html>
css代码:
*{ margin: 0; padding: 0;}body{ overflow: hidden;}.loading{ position: absolute; left: 0; top: 0; right: 0; bottom: 0; z-index: 2; background: #000;}#progress{ width: 100%; height: 200px;border: 1px solid #0064B4;background-color:#e6e6e6;}progress::-webkit-progress-bar { background: #e6e6e6; }progress::-webkit-progress-value { background: #0064B4; }.loading h3{ text-align: center; color: #fff;}.begin{ position: absolute; width: 100%; background: url("img/begin.jpg") 0 0 no-repeat; z-index: 3;}.begin h3{ display: none; position: absolute; left: 0; top: 20px; width: 100%; text-align: center; color: #fff;}.begin h3 i{ -webkit-animation: slide_letters 1.8s linear 1s infinite; -moz-animation: slide_letters 1.8s linear 1s infinite; -ms-animation: slide_letters 1.8s linear 1s infinite; animation: slide_letters 1.8s linear 1s infinite}.main{ position: absolute; left: 0; top: 0; right: 0; bottom: 0; overflow: hidden;}#score{ position: absolute; left: 0; top: 50px; width: 100%; text-align: center; color: #fff;}#score i{ color: red;}.main .bg{ background: url("img/bg.png") 0 0 repeat-x;}.land{ position: relative; float: left; background: url("img/land.png") 0 0 no-repeat; background-size: 100% 100%;}.move{ position: relative; left: 0;}.game-box{ position: fixed; bottom: 5%; width: 99999px;}.game-box .item{ position: absolute; top: 0;}#audio{ display: none; position: fixed; right: 20px; top: 20px;}.contra{ background: url("img/contra.png"); width: 97px; height: 109px; position: absolute; left: 0; bottom: 65%; z-index: 9;}.stick{ position: absolute; right: 0; bottom: 65%; width: 2px; background: gold; z-index: 99;}.rolling{ transition: transform 1s ease-in 0s;transform-origin:center bottom; -webkit-transform-origin:center bottom; -webkit-transform: rotate(90deg); transform: rotate(90deg); }.run{ width: 87px; height: 110px; background: url("img/run.png") 0px center no-repeat; overflow: hidden;-webkit-animation:run 1s steps(8) infinite;animation:run 1s steps(8) infinite;}@-webkit-keyframes run{ 100%{background-position: -696px 0px;}}@keyframes run{ 100%{background-position: -696px 0px;}}.begin h3 i:nth-child(1) { -webkit-animation-delay: 0.2s; -moz-animation-delay: 0.2s; -ms-animation-delay: 0.2s; animation-delay: 0.2s;}.begin h3 i:nth-child(2) { -webkit-animation-delay: 0.4s; -moz-animation-delay: 0.4s; -ms-animation-delay: 0.4s; animation-delay: 0.4s;}.begin h3 i:nth-child(3) { -webkit-animation-delay: 0.6s; -moz-animation-delay: 0.6s; -ms-animation-delay: 0.6s; animation-delay: 0.6s;}.begin h3 i:nth-child(4) { -webkit-animation-delay: 0.8s; -moz-animation-delay: 0.8s; -ms-animation-delay: 0.8s; animation-delay: 0.8s;}.begin h3 i:nth-child(5) { -webkit-animation-delay: 1s; -moz-animation-delay: 1s; -ms-animation-delay: 1s; animation-delay: 1s;}.begin h3 i:nth-child(6) { -webkit-animation-delay: 1.2s; -moz-animation-delay: 1.2s; -ms-animation-delay: 1.2s; animation-delay: 1.2s;}.begin h3 i:nth-child(7) { -webkit-animation-delay: 1.4s; -moz-animation-delay: 1.4s; -ms-animation-delay: 1.4s; animation-delay: 1.4s;}.begin h3 i:nth-child(8) { -webkit-animation-delay: 1.6s; -moz-animation-delay: 1.6s; -ms-animation-delay: 1.6s; animation-delay: 1.6s;}.begin h3 i:nth-child(9) { -webkit-animation-delay: 1.8s; -moz-animation-delay: 1.8s; -ms-animation-delay: 1.8s; animation-delay: 1.8s;}@-webkit-keyframes slide_letters { 0%,50% { color: #fff; } 25% { color: red;}}@-moz-keyframes slide_letters { 0%,50% { color: #fff; } 25% { color: red;}}@-ms-keyframes slide_letters { 0%,50% { color: #fff; } 25% { color: red;}}@keyframes slide_letters { 0%,50% { color: #fff; } 25% { color: red;}}
进度条加载source.js
var gameSource = { "bg":"style/img/bg.png", "contra":"style/img/contra.png", "land":"style/img/land.png", "run":"style/img/run.png", "begin":"style/img/begin.jpg"};var loadNum = 0;function loading(){ for(i in gameSource){ var obj = new Image(); obj.src = gameSource[i]; //console.log(gameSource[i]) obj.onload = function(){ console.log(this.src+" completed"); //gameSource.splice(i,1); loadNum++; $("#progress").attr({"value":loadNum}); }; }}loading()var matchState = [1,1,1];function checkState(){ var audioReadyState = [$("#audio")[0].readyState,$("#audio2")[0].readyState,$("#audio3")[0].readyState]; if(loadNum==8){ $("#progress").attr({"value":loadNum}); clearInterval(checkStateTimer); contraHero.begin(); $("#audio")[0].play(); } for(var i=0; i<audioReadyState.length;i++){ if(audioReadyState[i]==4 && matchState[i]){ matchState[i] = 0; console.log("test",i,audioReadyState,matchState) loadNum++; console.log(audioReadyState); } }}var checkStateTimer = setInterval(checkState,1000);//var a = [];//alert(~a); // -1//alert(+a); // 0//alert(++a); // 1//alert(!a); // false
localStorage保存得分记录
if(localStorage.TopScore){ $("#score .top").html(localStorage.TopScore);}function writeTopScore(score){ if(!localStorage.TopScore || score > localStorage.TopScore){ localStorage.TopScore = score; $("#score .top").html(localStorage.TopScore); }}
contraHero主体逻辑代码
var contraHer
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