微信打飞机js代码【1/2】

// JavaScript Document
var c = document.getElementById("dotu");
var cxt = c.getContext("2d");
var img = newImg("./assets/bg_01.jpg");
var fps;
cxt.drawImage(img,0,0,480,800);
 
var flivverLog = 0;
var flivver1 = newImg("./assets/flivver.png");
var flivver2 = newImg("./assets/flivver2.png");
var flivver3 = newImg("./assets/flivver3.png");
 
// 用于记录游戏的时间，越到后面越快
var time1 = 0;
var time2 = 80;
 
// 积分
var jifen = 0;
 
function getSudu(){
    var number = parseInt(Math.random()*10);
    if(number < 5 && number > 0){
        return number;
    }
    return 1;
}
// 飞机的对象
function flivverObj(hp,ewidth,eheight,eimg,esudu){
    // 随机的X
    this.x = parseInt(Math.random()*460+1);
    this.y = 0;
    // 血量
    this.hp = hp;
    // 挨打   
    this.hit = 0;
    // 是否死亡
    this.over = 0;
     
    this.width = ewidth;
    this.height = eheight;
    this.img = eimg;
    this.sudu = esudu;
}
 
// 获取飞机
function getFlivver(type){
    switch(type){
        case 1:
            return new flivverObj(100,50,30,flivver1,getSudu());
        case 2:
            return new flivverObj(500,70,90,flivver2,getSudu());
        case 3:
            return new flivverObj(1000,110,170,flivver3,getSudu());
    }
}
function cartridge(x,y){
    this.x = x;
    this.y = y; 
}
 
function gameover(){
    window.clearTimeout(fps);
    //$('#dotu').fadeOut();
    $('.content').css('position','relative');
    $('.content').append('<span style="position:absolute; top:5px; left:2px; font-size:150px; color:#cc0000;  text-align:center" id="sil"></span>');
    $('#sil').html('你').hide().fadeIn(1000,function(){
        $(this).html('你屎').hide().fadeIn(1000,function(){
            $(this).html('<a href="javascript:location.reload();" style="color:#cc0000" title="重新开始">你屎了</a><br>' + jifen  + ' 分').hide().fadeIn();
        }); 
    });
}
 
(function(cxt){
    var dotu = {nums:0};
    // 用于存放小飞机
    var flivver = new Array();
    var flivverImg = newImg("./assets/flivver.png");
    // 自己
    var me = {x:240,y:750};
    var meImg = newImg('assets/me.png');
    // 子弹
    var cartridges = new Array();
    var cartridgeImg = newImg('./assets/cartridge.png');
     
    var boo1 = newImg('./assets/boo1.png');
    var over = newImg('./assets/over.png');
    // 
    dotu.update = function(){
         
        dotu.setTimes();
        // 设置背景
        dotu.setBg();
        // 设置小飞机
        dotu.setFlivver();
        // 画自己
        dotu.setMe();
        // 子弹
        dotu.cartridge();
         
         
        cxt.font = "italic 20px 微软雅黑";
        cxt.strokeText("积分：" + jifen, 10, 30);
         
        $('#fjs').html(flivver.length);
        $('#zds').html(cartridges.length);
        $('#scfj').html("1000/" + time2 + " 毫秒");
    }
     
    dotu.setTimes = function(){
        time1++ ;
        // 100 秒 1个档位
        if(time1 == 1000){
            time1 = 0;
            time2 = (time2 == 20) ? 20 : time2 - 20;
        }
         
    }
     
     
    /**
     * 设置移动的背景
     */
    dotu.setBg = function(){
        dotu.nums++;
        if(dotu.nums == 800){
            dotu.nums = 0;  
        }
        // 画布的背景
        cxt.drawImage(img,0,dotu.nums,480,800);
        cxt.drawImage(img,0,dotu.nums - 800,480,800);
    }
     
    dotu.setFlivver = function(){
        // 生成飞机
        if(dotu.nums % time2 == 0){
            flivverLog++;
            if(flivverLog % 6 == 0){
                flivver.push(getFlivver(2));
            }else if(flivverLog % 13 == 0){
                flivver.push(getFlivver(3));
            }else{
                flivver.push(getFlivver(1));
            }
             
        }
         
        for(a in flivver){
             
             
             
            flivver[a].y += flivver[a].sudu;
            // 如果超出屏幕将该小飞机删除
            if(flivver[a].y > 780){
                flivver.splice(a, 1);
            }
            // 将小飞机画到画布上
             
             
            // 小飞机死亡
            if(flivver[a].over > 0){
                flivver[a].over --;
                 
                if(flivver[a].over > 20){
                    cxt.drawImage(boo1,flivver[a].x + flivver[a].width/2 - 20  ,flivver[a].y + flivver[a].height / 2 -10,41,39);
                }else if(flivver[a].over > 2){
                    cxt.drawImage(over,flivver[a].x + flivver[a].width/2 - 20 ,flivver[a].y + flivver[a].height / 2 -10,40,43);
                }else{
                    flivver.splice(a, 1);
                }
                 
                 
                 
            }else{
                cxt.drawImage(flivver[a].img,flivver[a].x,flivver[a].y,flivver[a].width,flivver[a].height);
                // 判断自己是否死亡
                if( me.x > (flivver[a].x - flivver[a].width + 20) && (me.x) <(flivver[a].x + flivver[a].width - 20) && (me.y) < (flivver[a].y + flivver[a].height + 20) && (me.y + 72) > (flivver[a].y - 20)){
                    gameover();
                }
             
                if(flivver[a].hit > 0){
                    cxt.drawImage(boo1,flivver[a].x + flivver[a].width/2 - 20 ,flivver[a].y + flivver[a].height / 2 -10,41,39);
                    //cxt.drawImage(boo1,flivver[a].x + 5 ,flivver[a].y,41,39);
                    flivver[a].hit--;
                }
            }
             
        }
    }
     
    // 更新自己的距离
    dotu.setMe = function(){
        cxt.drawImage(meImg,me.x,me.y,64,72);
    }
     
    // 更新子弹方法
    dotu.cartridge = function(){
        if(dotu.nums % 10 == 0){
            cartridges.push(new cartridge(me.x + 30,me.y));
        }
         
        for(i in cartridges){
            // 飞到顶部就将OBJ删除掉
            if(cartridges[i].y < 0){
                cartridges.splice(i, 1);
                continue;
            }
             
             
            cartridges[i].y -= 20;
            // 将小飞机画到画布上
            cxt.drawImage(cartridgeImg,cartridges[i].x,cartridges[i].y,7,17);
             
            // 子弹碰到飞机的情况
            for(j in flivver){
                if(flivver[j].over > 0){
                    continue;
                }
                if(cartridges[i].x > flivver[j].x && cartridges[i].x < flivver[j].x+ flivver[j].width && cartridges[i].y >  flivver[j].y && cartridges[i].y -flivver[j].height < flivver[j].y){
                     
                    flivver[j].hit = 10;
                    $('#isdz').html('打中了编号' + j);
                     
                    if(flivver[j].hp > 1){
                        flivver[j].hp -= 80;
                    }else{
                        flivver[j].over = 40;
                        jifen += 50000;
                    }
                    // 子弹消失
                    cartridges.splice(i, 1);
                    break;
                }
            }
        }
    }
     
    // 绑定鼠标事件
    c.addEventListener('mousemove', function onMouseMove(evt) {
        me.x = evt.layerX - $('#dotu').offset().left - 32;
        me.y = evt.layerY -  36 ;
        $('#sbX').html(me.x);
        $('#sbY').html(me.y);
    });
     
    fps = setInterval(dotu.update, 1000/100); 
}(cxt))
 
 
function newImg(src){
    var obj = new Image();
    obj.src = src;
    return obj;
}
 
//setInterval(h.update, 1000/65);