大家好，我是孙叫兽，本期内容给大家分享如何用 html+css+javaScript 去做一个简易网页版坦克游戏。
坦克游戏玩法及介绍
我们先来看一下首页。
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打开这个首页很简单，基本是上面这个样子，然后选择两个人回车就可以进行玩耍了，这个游戏需要两个人一起操作，玩家 1（我）： 使用 WASD 四个键进行上左下右方向的控制，通过 space 键进行设计射击。玩家 2（女朋友）：通过方向键上下左右控制方向，通过 enter 键盘射击。基本上我控制整个电脑键盘的左边，她控制电脑键盘的右边。通过 N 键进行下一关，P 键选择上一关。再键盘上显示如下。
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下面演示一下如何进入游戏
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通过方向键的下键选择两个人，然后点击回车进入游戏。也可以选择一个人进行回车进行战斗。
一个人战斗的状态。
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两个人战斗的状态。
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至于这个游戏规则我想大家都应该知道，这个里面的砖头可以打破，对手可以被打到，不能自己人打自己人，最外层的墙不能打破，坚硬的砖头也不能打破。把对手打完就可以进行下一关，不要先被对手的子弹打到，不然你就 GG 了。
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比如图中红色标记的砖头是打不破的，只能绕道走，还有只能再 yellow 标记的区域内操作，其它砖头用子弹就可以打破，不能让对手先打破你的大本营（我右边中间的老鹰），不然又得 GG.
整个游戏规则大体是这样，下面看一下代码。
项目结构
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整个项目由五部分组成，分为背景音乐、基础样式、动图、核心 JS 及首页静态展示。不涉及后端，纯前端实现。
index.html
<!DOCTYPE html><html lang="zh" class="no-js demo-1"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="js/jquery.min.js"></script> <script src="js/Helper.js"></script> <script src="js/keyboard.js"></script> <script src="js/const.js"></script> <script src="js/level.js"></script> <script src="js/crackAnimation.js"></script> <script src="js/prop.js"></script> <script src="js/bullet.js"></script> <script src="js/tank.js"></script> <script src="js/num.js"></script> <script src="js/menu.js"></script> <script src="js/map.js"></script> <script src="js/Collision.js"></script> <script src="js/stage.js"></script> <script src="js/main.js"></script> <link rel="stylesheet" type="text/css" href="css/default.css" /> <style type="text/css"> #canvasDiv canvas{ position:absolute; } </style> </head> <body> <div class="container"> <head><h3>操作说明：玩家1：WASD上左下右，space射击；玩家2：方向键，enter射击。n下一关，p上一关。</h3></head> <div class="main clearfix"> <div id="canvasDiv" > <canvas id="wallCanvas" ></canvas> <canvas id="tankCanvas" ></canvas> <canvas id="grassCanvas" ></canvas> <canvas id="overCanvas" ></canvas> <canvas id="stageCanvas" ></canvas> </div> </div> </div><!-- /container --> <div style="text-align:center;"><p>来源:<a href="https://sunmenglei.blog.csdn.net/" target="_blank">孙叫兽的博客</a></p></div> </body></html>
复制代码
css
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.htmleaf-top a { padding: 0 1em; letter-spacing: 0.1em; color: #888; display: inline-block;} .htmleaf-top a:hover { background: rgba(255,255,255,0.95); color: #333;} .htmleaf-top span.right { float: right;} .htmleaf-top span.right a { float: left; display: block;} .htmleaf-icon:before { font-family: 'codropsicons'; margin: 0 4px; speak: none; font-style: normal; font-weight: normal; font-variant: normal; text-transform: none; line-height: 1; -webkit-font-smoothing: antialiased;} /* Demo Buttons Style */.htmleaf-demos { padding-top: 1em; font-size: 0.9em;} .htmleaf-demos a { display: inline-block; margin: 0.2em; padding: 0.45em 1em; background: #999; color: #fff; font-weight: 700; border-radius: 2px;} .htmleaf-demos a:hover,.htmleaf-demos a.current-demo,.htmleaf-demos a.current-demo:hover { opacity: 0.6;} .htmleaf-nav { text-align: center;} .htmleaf-nav a { display: inline-block; margin: 20px auto; padding: 0.3em;}.bb-custom-wrapper { width: 420px; position: relative; margin: 0 auto 40px; text-align: center;}/* Demo Styles */ .demo-1 body { color: #87968e; background: #fff2e3;} .demo-1 a { color: #72b890;} .demo-1 .htmleaf-demos a { background: #72b890; color: #fff;} .demo-2 body { color: #fff; background: #c05d8e;} .demo-2 a { color: #d38daf;} .demo-2 a:hover,.demo-2 a:active { color: #fff;} .demo-2 .htmleaf-demos a { background: #883b61; color: #fff;} .demo-2 .htmleaf-top a:hover { background: rgba(255,255,255,0.3); color: #333;} .demo-3 body { color: #87968e; background: #fff2e3;} .demo-3 a { color: #ea5381;} .demo-3 .htmleaf-demos a { background: #ea5381; color: #fff;} .demo-4 body { color: #999; background: #fff2e3; overflow: hidden;} .demo-4 a { color: #1baede;} .demo-4 a:hover,.demo-4 a:active { opacity: 0.6;} .demo-4 .htmleaf-demos a { background: #1baede; color: #fff;} .demo-5 body { background: #fffbd6;}/****/.related { /*margin-top: 5em;*/ color: #fff; background: #333; text-align: center; font-size: 1.25em; padding: 3em 0; overflow: hidden;} .related a { display: inline-block; text-align: left; margin: 20px auto; padding: 10px 20px; opacity: 0.8; -webkit-transition: opacity 0.3s; transition: opacity 0.3s; -webkit-backface-visibility: hidden;} .related a:hover,.related a:active { opacity: 1;} .related a img { max-width: 100%;} .related a h3 { font-weight: 300; margin-top: 0.15em; color: #fff;} @media screen and (max-width: 40em) { .htmleaf-icon span { display: none; } .htmleaf-icon:before { font-size: 160%; line-height: 2; } } @media screen and (max-width: 46.0625em) { .column { width: 100%; min-width: auto; min-height: auto; padding: 1em; } .column p { text-align: left; font-size: 1.5em; } .column:nth-child(2) { box-shadow: 0 -1px 0 rgba(0,0,0,0.1); }} @media screen and (max-width: 25em) { .htmleaf-icon span { display: none; } }
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核心 js
/** * 检测2个物体是否碰撞 * @param object1 物体1 * @param object2 物体2 * @param overlap 允许重叠的大小 * @returns {Boolean} 如果碰撞了，返回true */function CheckIntersect(object1, object2, overlap){ // x-轴 x-轴 // A1------>B1 C1 A2------>B2 C2 // +--------+ ^ +--------+ ^ // | object1| | y-轴 | object2| | y-轴 // | | | | | | // +--------+ D1 +--------+ D2 // //overlap是重叠的区域值 A1 = object1.x + overlap; B1 = object1.x + object1.size - overlap; C1 = object1.y + overlap; D1 = object1.y + object1.size - overlap; A2 = object2.x + overlap; B2 = object2.x + object2.size - overlap; C2 = object2.y + overlap; D2 = object2.y + object2.size - overlap; //假如他们在x-轴重叠 if(A1 >= A2 && A1 <= B2 || B1 >= A2 && B1 <= B2) { //判断y-轴重叠 if(C1 >= C2 && C1 <= D2 || D1 >= C2 && D1 <= D2) { return true; } } return false;} /** * 坦克与地图块碰撞 * @param tank 坦克对象 * @param mapobj 地图对象 * @returns {Boolean} 如果碰撞，返回true */function tankMapCollision(tank,mapobj){ //移动检测，记录最后一次的移动方向，根据方向判断+-overlap, var tileNum = 0;//需要检测的tile数 var rowIndex = 0;//map中的行索引 var colIndex = 0;//map中的列索引 var overlap = 3;//允许重叠的大小 //根据tank的x、y计算出map中的row和col if(tank.dir == UP){ rowIndex = parseInt((tank.tempY + overlap - mapobj.offsetY)/mapobj.tileSize); colIndex = parseInt((tank.tempX + overlap- mapobj.offsetX)/mapobj.tileSize); }else if(tank.dir == DOWN){ //向下，即dir==1的时候，行索引的计算需要+tank.Height rowIndex = parseInt((tank.tempY - overlap - mapobj.offsetY + tank.size)/mapobj.tileSize); colIndex = parseInt((tank.tempX + overlap- mapobj.offsetX)/mapobj.tileSize); }else if(tank.dir == LEFT){ rowIndex = parseInt((tank.tempY + overlap- mapobj.offsetY)/mapobj.tileSize); colIndex = parseInt((tank.tempX + overlap - mapobj.offsetX)/mapobj.tileSize); }else if(tank.dir == RIGHT){ rowIndex = parseInt((tank.tempY + overlap- mapobj.offsetY)/mapobj.tileSize); //向右，即dir==3的时候，列索引的计算需要+tank.Height colIndex = parseInt((tank.tempX - overlap - mapobj.offsetX + tank.size)/mapobj.tileSize); } if(rowIndex >= mapobj.HTileCount || rowIndex < 0 || colIndex >= mapobj.wTileCount || colIndex < 0){ return true; } if(tank.dir == UP || tank.dir == DOWN){ var tempWidth = parseInt(tank.tempX - map.offsetX - (colIndex)*mapobj.tileSize + tank.size - overlap);//去除重叠部分 if(tempWidth % mapobj.tileSize == 0 ){ tileNum = parseInt(tempWidth/mapobj.tileSize); }else{ tileNum = parseInt(tempWidth/mapobj.tileSize) + 1; } for(var i=0;i<tileNum && colIndex+i < mapobj.wTileCount ;i++){ var mapContent = mapobj.mapLevel[rowIndex][colIndex+i]; if(mapContent == WALL || mapContent == GRID || mapContent == WATER || mapContent == HOME || mapContent == ANOTHREHOME){ if(tank.dir == UP){ tank.y = mapobj.offsetY + rowIndex * mapobj.tileSize + mapobj.tileSize - overlap; }else if(tank.dir == DOWN){ tank.y = mapobj.offsetY + rowIndex * mapobj.tileSize - tank.size + overlap; } return true; } } }else{ var tempHeight = parseInt(tank.tempY - map.offsetY - (rowIndex)*mapobj.tileSize + tank.size - overlap);//去除重叠部分 if(tempHeight % mapobj.tileSize == 0 ){ tileNum = parseInt(tempHeight/mapobj.tileSize); }else{ tileNum = parseInt(tempHeight/mapobj.tileSize) + 1; } for(var i=0;i<tileNum && rowIndex+i < mapobj.HTileCount;i++){ var mapContent = mapobj.mapLevel[rowIndex+i][colIndex]; if(mapContent == WALL || mapContent == GRID || mapContent == WATER || mapContent == HOME || mapContent == ANOTHREHOME){ if(tank.dir == LEFT){ tank.x = mapobj.offsetX + colIndex * mapobj.tileSize + mapobj.tileSize - overlap; }else if(tank.dir == RIGHT){ tank.x = mapobj.offsetX + colIndex * mapobj.tileSize - tank.size + overlap; } return true; } } } return false;} /** * 子弹与地图块的碰撞 * @param bullet 子弹对象 * @param mapobj 地图对象 */function bulletMapCollision(bullet,mapobj){ var tileNum = 0;//需要检测的tile数 var rowIndex = 0;//map中的行索引 var colIndex = 0;//map中的列索引 var mapChangeIndex = [];//map中需要更新的索引数组 var result = false;//是否碰撞 //根据bullet的x、y计算出map中的row和col if(bullet.dir == UP){ rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize); colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize); }else if(bullet.dir == DOWN){ //向下，即dir==1的时候，行索引的计算需要+bullet.Height rowIndex = parseInt((bullet.y - mapobj.offsetY + bullet.size)/mapobj.tileSize); colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize); }else if(bullet.dir == LEFT){ rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize); colIndex = parseInt((bullet.x - mapobj.offsetX)/mapobj.tileSize); }else if(bullet.dir == RIGHT){ rowIndex = parseInt((bullet.y - mapobj.offsetY)/mapobj.tileSize); //向右，即dir==3的时候，列索引的计算需要+bullet.Height colIndex = parseInt((bullet.x - mapobj.offsetX + bullet.size)/mapobj.tileSize); } if(rowIndex >= mapobj.HTileCount || rowIndex < 0 || colIndex >= mapobj.wTileCount || colIndex < 0){ return true; } if(bullet.dir == UP || bullet.dir == DOWN){ var tempWidth = parseInt(bullet.x - map.offsetX - (colIndex)*mapobj.tileSize + bullet.size); if(tempWidth % mapobj.tileSize == 0 ){ tileNum = parseInt(tempWidth/mapobj.tileSize); }else{ tileNum = parseInt(tempWidth/mapobj.tileSize) + 1; } for(var i=0;i<tileNum && colIndex+i < mapobj.wTileCount ;i++){ var mapContent = mapobj.mapLevel[rowIndex][colIndex+i]; if(mapContent == WALL || mapContent == GRID || mapContent == HOME || mapContent == ANOTHREHOME){ //bullet.distroy(); result = true; if(mapContent == WALL){ //墙被打掉 mapChangeIndex.push([rowIndex,colIndex+i]); }else if(mapContent == GRID){ }else{ isGameOver = true; break; } } } }else{ var tempHeight = parseInt(bullet.y - map.offsetY - (rowIndex)*mapobj.tileSize + bullet.size); if(tempHeight % mapobj.tileSize == 0 ){ tileNum = parseInt(tempHeight/mapobj.tileSize); }else{ tileNum = parseInt(tempHeight/mapobj.tileSize) + 1; } for(var i=0;i<tileNum && rowIndex+i < mapobj.HTileCount;i++){ var mapContent = mapobj.mapLevel[rowIndex+i][colIndex]; if(mapContent == WALL || mapContent == GRID || mapContent == HOME || mapContent == ANOTHREHOME){ //bullet.distroy(); result = true; if(mapContent == WALL){ //墙被打掉 mapChangeIndex.push([rowIndex+i,colIndex]); }else if(mapContent == GRID){ }else{ isGameOver = true; break; } } } } //更新地图 map.updateMap(mapChangeIndex,0); return result;}
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感兴趣的小伙伴也可以下载体验一下，勾起了慢慢的童年回忆。
源码地址：
https://download.csdn.net/download/weixin_41937552/18501741
好啦，本期内容就分享到这里，我们下期见！
