HTML5坦克大战（韩顺平版本）

HTML5坦克大战（韩顺平版本）

 2017-3-22 22:46:22 by SemiconductorKING

　　去年暑假学习了一下HTML5实现简单的坦克大战，觉得对JavaScript初学者来说，练习这个小游戏代码段可以学到很多东西，包括canvas的简单运用，类的构造，类的继承等等。编写一个完整的游戏要有较强的逻辑性，这个demo的学习视频以及demo文件下载见我分享的链接：

　　　链接：http://pan.baidu.com/s/1boAzSir 密码：mcp2

　　　demo截图：

　　此demo只是一个简单的练习，效果low不low先不提，看代码吧：

　　HTML文件代码：

  1 <!DOCTYPE html>
  2 <html>
  3 <head>
  4 <meta charset='utf-8'/>
  5 <script src='tank.js'></script>
  6 </head>
  7 <body onkeydown="changeDirect()">
  8 <h1 style="color: #0714b9;">html5坦克大战</h1>
  9 <div style="margin: 30px">
 10     <canvas id='tankMap' width='500px' height='300px' style='background-color:#3e0549;'>
 11         你的浏览器不支持canvas标签　|||||　You are seeing this message because your web browser does not support the canvas tag.
 12     </canvas>
 13 </div>
 14 <div id='add1'></div>
 15 <div id='add2'></div>
 16 <div id='add3'></div>
 17 <div style="margin: 30px;font-size: 12px">
 18     <p>控制方法：按下键盘w s a d或者↑ ↓ ← →分别是坦克的上下左右行驶<br/>按下j或者Enter键为射击</p>
 19 </div>
 20 </body>
 21 <script>
 22     var canvas = document.getElementById('tankMap');
 23     //获得画笔
 24     var ctx = canvas.getContext('2d');
 25 
 26     //定义炸弹数组
 27     var bombs = new Array();
 28 
 29     //构造英雄
 30     var hero = new Hero(380,260,0,heroColor);
 31 
 32     //创建敌人数组
 33     var enemyTanks = new Array();
 34 
 35     //创建敌人的子弹数组
 36     var enemyBullets = new Array();
 37     for(var i=0;i<6;i++){
 38         var enemyTank = new EnemyTank((i+1)*50,0,2,enemyColor);
 39         enemyTanks[i] = enemyTank;
 40         //drawTank(enemyTanks[i]);
 41         //让敌人的坦克动起来
 42         var timer = window.setInterval("enemyTanks["+i+"].run()",50);
 43         enemyTanks[i].timer = timer;
 44         //让敌人发射子弹
 45         var enemyBullet = new Bullet(enemyTanks[i].x+9,enemyTanks[i].y+30,enemyTanks[i].direct,enemyTanks[i],'enemy');
 46         enemyBullets.push(enemyBullet);
 47         enemyBullets[i].timer = window.setInterval("enemyBullets["+i+"].run()",50);
 48     }
 49 
 50     //定义英雄子弹数组
 51     var heroBullets = new Array();
 52     var heroBullet = null;
 53     
 54     if(hero.isLive){
 55             drawTank(hero);
 56         }
 57 
 58     //flashMap();
 59     //重置画布
 60     function flashMap(){
 61         ctx.clearRect(0,0,500,300);
 62         isHitHeroTank(enemyBullets,hero);
 63         if(hero.isLive){
 64             drawTank(hero);
 65         }
 66         
 67         isHitEnemyTank(heroBullets,enemyTanks);
 68         //画出自己坦克的子弹
 69         drawHeroBullet(heroBullets);
 70         //画出敌人坦克的子弹
 71         drawEnemyBullet(enemyBullets,enemyTanks);
 72         for(var i=0;i<6;i++){
 73             if(enemyTanks[i].isLive){
 74                 drawTank(enemyTanks[i]);
 75             }
 76         }
 77 
 78         //画出爆炸图片
 79         for(var k=0;k<bombs.length;k++){
 80             var img = new Image();
 81             img.src = 'bomb_1.gif';
 82             var x = bombs[k].x;
 83             var y = bombs[k].y;
 84             ctx.drawImage(img,x,y,30,30);
 85             ctx.drawImage(img,x,y,40,35);
 86             ctx.drawImage(img,x,y,35,40);
 87             bombs.splice(k,1);
 88         }
 89     }
 90 
 91     function changeDirect(){
 92         var keycode = event.keyCode;
 93         switch(keycode){
 94             case 38:;
 95             case 87:hero.moveUp();break;
 96             case 39:;
 97             case 68:hero.moveRight();break;
 98             case 40:;
 99             case 83:hero.moveBottom();break;
100             case 37:;
101             case 65:hero.moveLeft();break;
102             case 74:;
103             case 13:hero.shotEnemy();break;
104         }
105         flashMap();
106     }
107     window.setInterval("flashMap()",50);
108 </script>
109 </html>

　　tank.js代码：

  1 //定义敌人和我们自己的坦克的颜色
  2 var enemyColor = new Array("#0BB","#0FF");
  3 var heroColor = new Array("#dc0","#ff5");
  4 //封装一个公用的坦克父类
  5 function Tank(x,y,direct){
  6     this.x = x;
  7     this.y = y;
  8     this.speed = 3;
  9     this.direct = direct;
 10     this.moveUp = function(){
 11         if (hero.y>0) {
 12             hero.y -= hero.speed;
 13         }
 14         hero.direct = 0;
 15     }
 16     this.moveRight = function(){
 17         if (hero.x+30<500) {
 18             hero.x += hero.speed;
 19         }
 20         hero.direct = 1;
 21     }
 22     this.moveBottom = function(){
 23         if (hero.y+30<300) {
 24             hero.y += hero.speed;
 25         }
 26         hero.direct = 2;
 27     }
 28     this.moveLeft = function(){
 29         if (hero.x>0) {
 30             hero.x -= hero.speed;
 31         }
 32         hero.direct = 3;
 33     }
 34 }
 35 
 36 //英雄坦克类
 37 function Hero(x,y,direct,color){
 38     //将坦克类的构造方法赋给hero
 39     this.hero = Tank;
 40     //调用,拥有坦克类的所有的属性和方法
 41     this.hero(x,y,direct);
 42     this.color = color;
 43     this.direct = direct;
 44     this.isLive = true;
 45     this.shotEnemy = function(){
 46         switch(this.direct){
 47             case 0:
 48                 heroBullet = new Bullet(this.x+9,this.y,this.direct);
 49             break;
 50             case 1:
 51                 heroBullet = new Bullet(this.x+30,this.y+9,this.direct);
 52             break;
 53             case 2:
 54                 heroBullet = new Bullet(this.x+9,this.y+30,this.direct);
 55             break;
 56             case 3:
 57                 heroBullet = new Bullet(this.x,this.y+9,this.direct);
 58             break;
 59         }
 60         heroBullets.push(heroBullet);
 61         heroBullets[heroBullets.length-1].timer = window.setInterval("heroBullets["+(heroBullets.length-1)+"].run()",50);
 62     }
 63 }
 64 //敌人的坦克
 65 function EnemyTank(x,y,direct,color){
 66     //将坦克类的构造方法赋给敌人坦克
 67     this.enemyTank = Tank;
 68     //调用,拥有坦克类的所有的属性和方法
 69     this.enemyTank(x,y,direct);
 70     this.color = color;
 71     this.isLive = true;
 72     this.timer = null;
 73     this.speed = 1;
 74     this.count = 0;
 75     this.direct = direct;
 76     this.bulletIsLive = true;
 77     this.run = function(){
 78         switch(this.direct){
 79             case 0:
 80                 if(this.y>0){
 81                 this.y--;
 82             }
 83             break;
 84             case 1:
 85                 if(this.x+30<500){
 86                 this.x += this.speed;
 87             }
 88             break;
 89             case 2:
 90                 if(this.y+30<300){
 91                 this.y += this.speed;
 92             }
 93             break;
 94             case 3:
 95                 if(this.x>0){
 96                 this.x -= this.speed;
 97             }
 98             break;
 99         }
100         
101         if(this.count>=30){
102             this.direct = Math.round(Math.random()*3);
103             this.count=0;
104         }
105         this.count++;
106         //在坦克走的过程中,判断一下,这个坦克的子弹是否活着
107         if(this.bulletIsLive == false && this.isLive){
108             //子弹over，加子弹
109             switch(this.direct){
110                 case 0:
111                     enemyBullets.push(new Bullet(this.x+9,this.y,this.direct,this,'enemy'));
112                 break;
113                 case 1:
114                     enemyBullets.push(new Bullet(this.x+30,this.y+9,this.direct,this,'enemy'));
115                 break;
116                 case 2:
117                     enemyBullets.push(new Bullet(this.x+9,this.y+30,this.direct,this,'enemy'));
118                 break;
119                 case 3:
120                     enemyBullets.push(new Bullet(this.x,this.y+9,this.direct,this,'enemy'));
121                 break;
122             }
123             enemyBullets[enemyBullets.length-1].timer = window.setInterval("enemyBullets["+(enemyBullets.length-1)+"].run()",50);
124                 this.bulletIsLive = true;
125         }
126     }
127 }
128 //绘制坦克
129     function drawTank(hero){
130     switch(hero.direct){
131         case 0:
132         case 2:
133             ctx.fillStyle = hero.color[0];
134             ctx.fillRect(hero.x,hero.y,5,30);
135             ctx.fillRect(hero.x+15,hero.y,5,30);
136             ctx.fillRect(hero.x+6,hero.y+5,8,20);
137             ctx.fillStyle = hero.color[1];
138             ctx.beginPath();
139             ctx.arc(hero.x+10,hero.y+15,3,0,Math.PI*2,true);
140             ctx.closePath();
141             ctx.fill();
142             //画出炮筒(直线)
143             ctx.strokeStyle = hero.color[1];
144             ctx.lineWidth = 2;
145             ctx.moveTo(hero.x+10,hero.y+15);
146             if(hero.direct==0){
147                 ctx.lineTo(hero.x+10,hero.y);
148             }else if(hero.direct==2){
149                 ctx.lineTo(hero.x+10,hero.y+30);
150             }
151             ctx.stroke();
152         break;
153         case 1:
154         case 3:
155             ctx.fillStyle = hero.color[0];
156             ctx.fillRect(hero.x,hero.y,30,5);
157             ctx.fillRect(hero.x,hero.y+15,30,5);
158             ctx.fillRect(hero.x+5,hero.y+6,20,8);
159             //需要注意,画圆的时候需要重新开启路径
160             ctx.fillStyle = hero.color[1];
161             ctx.beginPath();
162             ctx.arc(hero.x+15,hero.y+10,3,0,Math.PI*2,true);
163             ctx.closePath();
164             ctx.fill();
165             //画出炮筒(直线)
166             ctx.strokeStyle = hero.color[1];
167             ctx.lineWidth = 2;
168             ctx.moveTo(hero.x+15,hero.y+10);
169             if(hero.direct ==1){
170                 ctx.lineTo(hero.x+30,hero.y+10);
171             }else if(hero.direct ==3){
172                 ctx.lineTo(hero.x,hero.y+10);
173             }
174             ctx.stroke();
175         break;
176     }
177 }
178 
179 //定义一个子弹类
180 function Bullet(x,y,direct,tank,type){
181     this.x = x;
182     this.y = y;
183     this.speed = 3;
184     this.direct = direct;
185     this.timer = null;
186     this.isLive = true;
187     this.tank = tank;
188     this.type = type;
189     this.run = function(){
190         switch(this.direct){
191             case 0:
192                 this.y -= this.speed;
193             break;
194             case 1:
195                 this.x += this.speed;
196             break;
197             case 2:
198                 this.y += this.speed;
199             break;
200             case 3:
201                 this.x -= this.speed;
202             break;
203         }
204         document.getElementById('add1').innerText = " 子弹x轴:"+this.x+" 子弹y轴:"+this.y;
205         document.getElementById('add2').innerText = " 坦克x轴:"+hero.x+" 坦克y轴:"+hero.y;
206         document.getElementById('add3').innerText = " hero子弹数量:"+heroBullets.length;
207         if(this.x <0 || this.x>=500 ||this.y<0 || this.y>300 || this.isLive==false){
208             this.isLive = false;
209             if(this.type=='enemy'){
210                 this.tank.bulletIsLive = false;
211             }
212             window.clearInterval(this.timer);
213         }
214     }
215 }
216 function drawHeroBullet(bullets){
217     for(var i=0;i<bullets.length;i++){
218         var heroBullet = bullets[i];
219         if(heroBullet.isLive){
220             ctx.fillStyle = '#FEF26E';
221             ctx.fillRect(heroBullet.x,heroBullet.y,2,2);
222         }
223     }
224 }
225 //画出敌人坦克的子弹
226 function drawEnemyBullet(enemyBullets){
227     for(var i=0;i<enemyBullets.length;i++){
228         var enemyBullet = enemyBullets[i];
229         if(enemyBullet.isLive){
230             ctx.fillRect(enemyBullet.x,enemyBullet.y,2,2);
231         }
232     }
233 }
234 function isHitEnemyTank(heroBullets,enemyTanks){
235     for(var i=0;i<heroBullets.length;i++){
236         for(var j=0;j<enemyTanks.length;j++){
237             //判断一下自己的子弹和敌人的坦克坐标
238             if(enemyTanks[j].isLive){
239                 switch(enemyTanks[j].direct){
240                 case 0:
241                 case 2:
242                     if(heroBullets[i].x>=enemyTanks[j].x&&heroBullets[i].x<=enemyTanks[j].x+20&&heroBullets[i].y>=enemyTanks[j].y&&heroBullets[i].y<=enemyTanks[j].y+30){
243                         //标记敌人的坦克和我们的子弹已经死掉了
244                         heroBullets[i].isLive = false;
245                         enemyTanks[j].isLive = false;
246                         var bomb = new Bomb(enemyTanks[j].x,enemyTanks[j].y);
247                         bombs.push(bomb);
248 
249                 }
250                 break;
251                 case 1:
252                 case 3:
253                     if(heroBullets[i].x>=enemyTanks[j].x&&heroBullets[i].x<=enemyTanks[j].x+30&&heroBullets[i].y>=enemyTanks[j].y&&heroBullets[i].y<=enemyTanks[j].y+20){
254                         //标记敌人的坦克和我们的子弹已经死掉了
255                         heroBullets[i].isLive = false;
256                         enemyTanks[j].isLive = false;
257                         var bomb = new Bomb(enemyTanks[j].x,enemyTanks[j].y);
258                         bombs.push(bomb);
259                 }
260                 break;
261             }
262             }
263             
264         }
265     }
266 }
267 
268 //定义炸弹类
269 function Bomb(x,y){
270     this.x = x;
271     this.y = y;
272 }
273 
274 //判断敌人的子弹是否击中自己的坦克
275 function isHitHeroTank(enemyBullets,heroTank){
276     for(var i=0;i<enemyBullets.length;i++){
277         if(enemyBullets[i].isLive && heroTank.isLive){
278             switch(heroTank.direct){
279             case 0:
280             case 2:
281                 if(enemyBullets[i].x >= heroTank.x && enemyBullets[i].x <= heroTank.x+20 && enemyBullets[i].y >= heroTank.y && enemyBullets[i].y <= heroTank.y +30){
282                 heroTank.isLive = false;
283                 enemyBullets[i].isLive = false;
284             }
285             break;
286             case 1:
287             case 3:
288                 if(enemyBullets[i].x >= heroTank.x && enemyBullets[i].x <= heroTank.x+30 && enemyBullets[i].y >= heroTank.y && enemyBullets[i].y <= heroTank.y +20){
289                 heroTank.isLive = false;
290                 enemyBullets[i].isLive = false;
291             }
292             break;
293         }
294         }
295     }
296 }

end...

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原文地址：https://www.cnblogs.com/SemiconductorKING/p/6602600.html