javascript 模拟坦克大战游戏(html5版)附源码下载(3)

/**
* Created by Alane on 14-3-11.
*/
function Bullet (x, y, direct, color) {
this.isdead = false;
this.x = x;
this.y = y;
this.direct = direct;
this.speed = 4;
this.color = color;
//定时器，自行运动
this.timer = setInterval ((function (context) {
return function () {
Bullet.prototype.move.call (context)
}
}) (this), 30);
}
Bullet.prototype.move = 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;
}

//边界检测
if (this.y < 0 || this.x > width || this.y > height || this.x < 0) {
clearInterval (this.timer);
this.isdead = true;
}

//碰撞检测 检测敌人坦克
for(var i=0;i<allTank.length;i++){
var temp = allTank[i];
if(temp.isdead){
continue;
}
switch (temp.direct){
case 0:
case 2:if(this.x>temp.x && this.x<temp.x+20 && this.y>temp.y&& this.y<temp.y+30){
if(this.color == temp.color){
break;
}
Bombs.push(new Bomb(temp.x-10,temp.y-10));
clearInterval (this.timer);
this.isdead = true;
temp.isdead = true;
}break
case 1:
case 3:if(this.x>temp.x && this.x<temp.x+30 && this.y>temp.y&& this.y<temp.y+20){
if(this.color == temp.color){
break;
}
Bombs.push(new Bomb(temp.x-10,temp.y-10));
clearInterval (this.timer);
this.isdead = true;
temp.isdead = true;
}break;
}
}

}

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