吃了 1000+ 个月饼

function Ship(ctx){
 gameMonitor.im.loadImage(['static/img/player.png']);
 this.width = 80;
 this.height = 80;
 this.left = gameMonitor.w/2 - this.width/2;
 this.top = gameMonitor.h - 2*this.height;
 this.player = gameMonitor.im.createImage('static/img/player.png');

 this.paint = function(){
  ctx.drawImage(this.player, this.left, this.top, this.width, this.height);
 }

 this.setPosition = function(event){
  if(gameMonitor.isMobile()){
   var tarL = event.changedTouches[0].clientX;
   var tarT = event.changedTouches[0].clientY;
  }
  else{
   var tarL = event.offsetX;
   var tarT = event.offsetY;
  }
  this.left = tarL - this.width/2 - 16;
  this.top = tarT - this.height/2;
  if(this.left<0){
   this.left = 0;
  }
  if(this.left>320-this.width){
   this.left = 320-this.width;
  }
  if(this.top<0){
   this.top = 0;
  }
  if(this.top>gameMonitor.h - this.height){
   this.top = gameMonitor.h - this.height;
  }
  this.paint();
 }

 this.controll = function(){
  var _this = this;
  var stage = $('#gamepanel');
  var currentX = this.left,
   currentY = this.top,
   move = false;
  stage.on(gameMonitor.eventType.start, function(event){
   _this.setPosition(event);
   move = true;
  }).on(gameMonitor.eventType.end, function(){
   move = false;
  }).on(gameMonitor.eventType.move, function(event){
   event.preventDefault();
   if(move){
    _this.setPosition(event); 
   }
   
  });
 }

 this.eat = function(foodlist){
  for(var i=foodlist.length-1; i>=0; i--){
   var f = foodlist[i];
   if(f){
    var l1 = this.top+this.height/2 - (f.top+f.height/2);
    var l2 = this.left+this.width/2 - (f.left+f.width/2);
    var l3 = Math.sqrt(l1*l1 + l2*l2);
    if(l3<=this.height/2 + f.height/2){
     foodlist[f.id] = null;
     if(f.type==0){
      gameMonitor.stop();
      $('#gameoverPanel').show();

      setTimeout(function(){
       $('#gameoverPanel').hide();
       $('#resultPanel').show();
       gameMonitor.getScore();
      }, 2000);
     }
     else{
      $('#score').text(++gameMonitor.score);
      $('.heart').removeClass('hearthot').addClass('hearthot');
      setTimeout(function() {
       $('.heart').removeClass('hearthot')
      }, 200);
     }
    }
   }
   
  }
 }
}

function Food(type, left, id){
 this.speedUpTime = 300;
 this.id = id;
 this.type = type;
 this.width = 50;
 this.height = 50;
 this.left = left;
 this.top = -50;
 this.speed = 0.04 * Math.pow(1.2, Math.floor(gameMonitor.time/this.speedUpTime));
 this.loop = 0;

 var p = this.type == 0 ? 'static/img/food1.png' : 'static/img/food2.png';
 this.pic = gameMonitor.im.createImage(p);
}
Food.prototype.paint = function(ctx){
 ctx.drawImage(this.pic, this.left, this.top, this.width, this.height);
}
Food.prototype.move = function(ctx){
 if(gameMonitor.time % this.speedUpTime == 0){
  this.speed *= 1.2;
 }
 this.top += ++this.loop * this.speed;
 if(this.top>gameMonitor.h){
   gameMonitor.foodList[this.id] = null;
 }
 else{
  this.paint(ctx);
 }
}

function ImageMonitor(){
 var imgArray = [];
 return {
  createImage : function(src){
   return typeof imgArray[src] != 'undefined' ? imgArray[src] : (imgArray[src] = new Image(), imgArray[src].src = src, imgArray[src])
  },
  loadImage : function(arr, callback){
   for(var i=0,l=arr.length; i<l; i++){
    var img = arr[i];
    imgArray[img] = new Image();
    imgArray[img].onload = function(){
     if(i==l-1 && typeof callback=='function'){
      callback();
     }
    }
    imgArray[img].src = img
   }
  }
 }
}

genorateFood : function(){
  var genRate = 50; //产生月饼的频率
  var random = Math.random();
  if(random*genRate>genRate-1){
   var left = Math.random()*(this.w - 50);
   var type = Math.floor(left)%2 == 0 ? 0 : 1;
   var id = this.foodList.length;
   var f = new Food(type, left, id);
   this.foodList.push(f);
  }
 },