有人幫我看下嗎？果實不顯示

?var fruitObj = function()

?{

? this.alive = []; //bool

? 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.born(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++)

? { ?

? //draw

? // find an ane, grow, fly up

? if (this.l[i] <= 14) {

? this.l[i] += 0.01 * deltaTime; //保證游戲動作的流暢與連貫

? }

? else{

? this.y[i] -= 0.01 * deltaTime;

? }

? 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.born = function(i)

?{

? var aneID = Math.floor(Math.random() * ane.num); //?？鴺?biāo)

? this.x[i] = ane.x[aneID]; ? ? ? ?//果實的x坐標(biāo)

? this.y[i] = canHeight - ane.len[aneID]; ? ?////果實的y坐標(biāo)

? ? this.l[i] = 0;

?}