tanke.js文件：
//定义敌人和我们自己的坦克的颜色
var enemyColor = new Array('#00FEFE','#00A2B5');
var heroColor = new Array('#FEF26E','#BA9658');
//封装一个公用的坦克类
function Tank(x,y,direct){
this.x = x;
this.y = y;
this.speed = 3;
this.direct = direct;
this.moveUp = function(){
hero.y -= hero.speed;
hero.direct = 0;
}
this.moveRight = function(){
hero.x += hero.speed;
hero.direct = 1;
}
this.moveBottom = function(){
hero.y += hero.speed;
hero.direct = 2;
}
this.moveLeft = function(){
hero.x -= hero.speed;
hero.direct = 3;
}
}
//英雄坦克类
function Hero(x,y,direct,color){
//将坦克类的构造方法赋给hero
this.hero = Tank;
//调用,拥有坦克类的所有的属性和方法
this.hero(x,y,direct);
this.color = color;
this.direct = direct;
this.isLive = true;
this.shotEnemy = function(){
switch(this.direct){
case 0:
heroBullet = new Bullet(this.x+9,this.y,this.direct);
break;
case 1:
heroBullet = new Bullet(this.x+30,this.y+9,this.direct);
break;
case 2:
heroBullet = new Bullet(this.x+9,this.y+30,this.direct);
break;
case 3:
heroBullet = new Bullet(this.x,this.y+9,this.direct);
break;
}
heroBullets.push(heroBullet);
heroBullets[heroBullets.length-1].timer = window.setInterval("heroBullets["+(heroBullets.length-1)+"].run()",50);
}
}
//敌人的坦克
function EnemyTank(x,y,direct,color){
//将坦克类的构造方法赋给hero
this.enemyTank = Tank;
//调用,拥有坦克类的所有的属性和方法
this.enemyTank(x,y,direct);
this.color = color;
this.isLive = true;
this.timer = null;
this.speed = 1;
this.count = 0;
this.direct = direct;
this.bulletIsLive = true;
this.run = function(){
switch(this.direct){
case 0:
if(this.y>0){
this.y--;
}
break;
case 1:
if(this.x+30<500){
this.x += this.speed;
}
break;
case 2:
if(this.y+30<300){
this.y += this.speed;
}
break;
case 3:
if(this.x>0){
this.x -= this.speed;
}
break;
}
if(this.count>=30){
this.direct = Math.round(Math.random()*3);
this.count=0;
}
this.count++;
//在坦克走的过程中,判断一下,这个坦克的子弹是否活着
if(this.bulletIsLive == false && this.isLive){
//子弹已死,给他补充一颗
switch(this.direct){
case 0:
enemyBullets.push(new Bullet(this.x+9,this.y,this.direct,this,'enemy'));
break;
case 1:
enemyBullets.push(new Bullet(this.x+30,this.y+9,this.direct,this,'enemy'));
break;
case 2:
enemyBullets.push(new Bullet(this.x+9,this.y+30,this.direct,this,'enemy'));
break;
case 3:
enemyBullets.push(new Bullet(this.x,this.y+9,this.direct,this,'enemy'));
break;
}
enemyBullets[enemyBullets.length-1].timer = window.setInterval("enemyBullets["+(enemyBullets.length-1)+"].run()",50);
this.bulletIsLive = true;
}
}
}
//绘制坦克
function drawTank(hero){
switch(hero.direct){
case 0:
case 2:
//alert(ctx);
ctx.fillStyle = hero.color[0];
ctx.fillRect(hero.x,hero.y,5,30);
ctx.fillRect(hero.x+15,hero.y,5,30);
ctx.fillRect(hero.x+6,hero.y+5,8,20);
//需要注意,画圆的时候需要重新开启路径
ctx.fillStyle = hero.color[1];
ctx.beginPath();
ctx.arc(hero.x+10,hero.y+15,3,0,Math.PI*2,true);
ctx.closePath();
ctx.fill();
//画出炮筒(直线)
ctx.strokeStyle = hero.color[1];
ctx.lineWidth = 2;
ctx.moveTo(hero.x+10,hero.y+15);
if(hero.direct==0){
ctx.lineTo(hero.x+10,hero.y);
}else if(hero.direct==2){
ctx.lineTo(hero.x+10,hero.y+30);
}
ctx.stroke();
break;
case 1:
case 3:
ctx.fillStyle = hero.color[0];
ctx.fillRect(hero.x,hero.y,30,5);
ctx.fillRect(hero.x,hero.y+15,30,5);
ctx.fillRect(hero.x+5,hero.y+6,20,8);
//需要注意,画圆的时候需要重新开启路径
ctx.fillStyle = hero.color[1];
ctx.beginPath();
ctx.arc(hero.x+15,hero.y+10,3,0,Math.PI*2,true);
ctx.closePath();
ctx.fill();
//画出炮筒(直线)
ctx.strokeStyle = hero.color[1];
ctx.lineWidth = 2;
ctx.moveTo(hero.x+15,hero.y+10);
if(hero.direct ==1){
ctx.lineTo(hero.x+30,hero.y+10);
}else if(hero.direct ==3){
ctx.lineTo(hero.x,hero.y+10);
}
ctx.stroke();
break;
}
}
//定义一个子弹类
function Bullet(x,y,direct,tank,type){
this.x = x;
this.y = y;
this.speed = 3;
this.direct = direct;
this.timer = null;
this.isLive = true;
this.tank = tank;
this.type = type;
this.run = function(){
switch(this.direct){
case 0:
this.y -= this.speed;
break;
case 1:
this.x += this.speed;
break;
case 2:
this.y += this.speed;
break;
case 3:
this.x -= this.speed;
break;
}
document.getElementById('aa').innerText = "x轴:"+this.x+"y轴:"+this.y;
if(this.x <0 || this.x>=500 ||this.y<0 || this.y>300 ||this.isLive==false){
this.isLive = false;
//this.tank.bulletIsLive = false;
if(this.type=='enemy'){
this.tank.bulletIsLive = false;
}
window.clearInterval(this.timer);
}
}
}
function drawHeroBullet(bullets){
for(var i=0;i<bullets.length;i++){
var heroBullet = bullets[i];
if(heroBullet.isLive){
ctx.fillStyle = '#00FEFE';
ctx.fillRect(heroBullet.x,heroBullet.y,2,2);
}
}
}
//画出敌人坦克的子弹
function drawEnemyBullet(enemyBullets){
for(var i=0;i<enemyBullets.length;i++){
var enemyBullet = enemyBullets[i];
if(enemyBullet.isLive){
ctx.fillRect(enemyBullet.x,enemyBullet.y,2,2);
}
}
}
function isHitEnemyTank(heroBullets,enemyTanks){
for(var i=0;i<heroBullets.length;i++){
for(var j=0;j<enemyTanks.length;j++){
//判断一下自己的子弹和敌人的坦克坐标
if(enemyTanks[j].isLive){
switch(enemyTanks[j].direct){
case 0:
case 2:
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){
//标记敌人的坦克和我们的子弹已经死掉了
heroBullets[i].isLive = false;
enemyTanks[j].isLive = false;
var bomb = new Bomb(enemyTanks[j].x,enemyTanks[j].y);
bombs.push(bomb);
}
break;
case 1:
case 3:
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){
//标记敌人的坦克和我们的子弹已经死掉了
heroBullets[i].isLive = false;
enemyTanks[j].isLive = false;
var bomb = new Bomb(enemyTanks[j].x,enemyTanks[j].y);
bombs.push(bomb);
}
break;
}
}
}
}
}
//定义炸弹类
function Bomb(x,y){
this.x = x;
this.y = y;
}
//判断敌人的子弹是否击中自己的坦克
function isHitHeroTank(enemyBullets,heroTank){
for(var i=0;i<enemyBullets.length;i++){
if(enemyBullets[i].isLive && heroTank.isLive){
switch(heroTank.direct){
case 0:
case 2:
if(enemyBullets[i].x >= heroTank.x && enemyBullets[i].x <= heroTank.x+20 && enemyBullets[i].y >= heroTank.y && enemyBullets[i].y <= heroTank.y +30){
heroTank.isLive = false;
enemyBullets[i].isLive = false;
}
break;
case 1:
case 3:
if(enemyBullets[i].x >= heroTank.x && enemyBullets[i].x <= heroTank.x+30 && enemyBullets[i].y >= heroTank.y && enemyBullets[i].y <= heroTank.y +20){
heroTank.isLive = false;
enemyBullets[i].isLive = false;
}
break;
}
}
}
}
tanke.html文件：
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'/>
<script src='tankGame3.js'></script>
</head>
<body onkeydown="changeDirect()">
<canvas id='tankMap' width='500px' height='300px' style='background-color:black'>
你的浏览器不支持canvas标签</canvas>
<span id='aa'></span>
</body>
<script>
//开始画出我们的tanke
var canvas = document.getElementById('tankMap');
//相当于获得画笔
var ctx = canvas.getContext('2d');
//定义炸弹
var bombs = new Array();
var hero = new Hero(140,90,0,heroColor);
var enemyTanks = new Array();
//敌人的子弹数组
var enemyBullets = new Array();
for(var i=0;i<3;i++){
var enemyTank = new EnemyTank((i+1)*50,0,2,enemyColor);
enemyTanks[i] = enemyTank;
//drawTank(enemyTanks[i]);
//让敌人的坦克动起来
var timer = window.setInterval("enemyTanks["+i+"].run()",50);
enemyTanks[i].timer = timer;
//让敌人发射子弹
var enemyBullet = new Bullet(enemyTanks[i].x+9,enemyTanks[i].y+30,enemyTanks[i].direct,enemyTanks[i],'enemy');
enemyBullets.push(enemyBullet);
enemyBullets[i].timer = window.setInterval("enemyBullets["+i+"].run()",50);
}
//定义子弹数组
var heroBullets = new Array();
var heroBullet = null;
if(hero.isLive){
drawTank(hero);
}
flashMap();
function flashMap(){
ctx.clearRect(0,0,500,300);
isHitHeroTank(enemyBullets,hero);
if(hero.isLive){
drawTank(hero);
}
isHitEnemyTank(heroBullets,enemyTanks);
//画出自己坦克的子弹
drawHeroBullet(heroBullets);
//画出敌人坦克的子弹
drawEnemyBullet(enemyBullets,enemyTanks);
for(var i=0;i<3;i++){
if(enemyTanks[i].isLive){
drawTank(enemyTanks[i]);
}
}
//画出炸弹
for(var k=0;k<bombs.length;k++){
var img = new Image();
img.src = 'bomb_1.gif';
var x = bombs[k].x;
var y = bombs[k].y;
ctx.drawImage(img,x,y,30,30);
bombs.splice(k,1);
}
}
function changeDirect(){
var keycode = event.keyCode;
switch(keycode){
case 87:
hero.moveUp();
break;
case 68:
hero.moveRight();
break;
case 83:
hero.moveBottom();
break;
case 65:
hero.moveLeft();
break;
case 74:
hero.shotEnemy();
break;
}
flashMap();
}
window.setInterval("flashMap()",100);
</script>
</html>
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