fruitObj.prototype.draw=function?()?{
????for(var?i=0;i<this.num;i++){
????//????draw
????//????find?a?ane,grow,fly?up
????????if(this.l[i]<=14){
????????????this.l[i]+=0.01*daltaTime;
????????}
????????else{
????????????this.y[i]-=0.07*daltaTime
????????}
????????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])
????}
}
//果實狀態(tài)，允許15個
fruitObj.prototype.update=function?()?{
????var?num=0;
????for(var?i=0;i<num;i++){
????????if(this.alive[i]){
????????????num++
????????}
????}
}
fruitObj.prototype.born=function?(i)?{
//????找到坐標
//????問題：不用取整，無法獲得ID
????var?aneId=Math.floor(Math.random()*ane.num);
????this.x[i]=ane.x[aneId];
????this.y[i]=canHeight-ane.y[aneId]
????this.l[i]=0;
}