//這是我的代碼塊
var?fruitObj?=?function()?{
???this.alive?=?[];//boolen
???this.x?=?[];
???this.y?=?[];
???this.l?=?[];
???this.orange?=?new?Image();
???this.blue?=?new?Image();
};
fruitObj.prototype.num?=?30;
fruitObj.prototype.init?=?function?()?{
???for?(var?i?=?0;?i?<?this.num;?i++)?{
??????this.alive[i]=true;
??????this.x[i]=0;
??????this.y[i]=0;
??????this.l[i]?=?0;
??????this.bron(i);
???}
???this.orange.src?=?"./src/fruit.png";
???this.blue.src?=?"./src/blue.png";
};
fruitObj.prototype.draw?=?function()?{
???for?(var?i?=?0;?i?<?this.num;?i++)?{
??????console.log(deltaTime);//可打印出deltaTime數(shù)值
??????if?(this.l[i]<=15)?{
??????console.log(deltaTime);//打印出NaN
?????????this.l[i]+=0.01?*deltaTime;
?????????//console.log(this.l[i]);//同樣NaN
??????}
??????ctx2.drawImage(this.orange,this.x[i]?-?this.l[i]?*?0.5,this.y[i]-this.l[i]?*?0.5,this.l[i],this.l[i]);
???}
};
fruitObj.prototype.update?=?function()?{
???var?num?=?0;
???for?(var?i?=?0;?i?<?this.num;?i++)?{
??????if?(this.alive[i])?{
?????????num++;
??????}
???}
};
fruitObj.prototype.bron?=?function(i)?{
???var?aneID??=?Math.floor(Math.random()*ane.num);
???this.x[i]?=?ane.x[aneID];
???this.y[i]?=?canHeight-?ane.len[aneID];
};