果实不能显示，没有报错

源自：2-5 果实绘制（果实上浮）

果实不能显示，没有报错

var fruitObj=function(){
    this.alive=[];
    this.x=[];
    this.y=[];
    this.l=[];
    this.spd=[];
    this.orange=new Image();
    this.blue=new Image();
}

fruitObj.prototype.num=30;//bool

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.spd[i]=Math.random()*0.01+0.005;
        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.alive[i]){
            if(this.l[i]<=14)
            {
                this.l[i]+=this.spd[i]*deltaTime;
            }
            else
            {
                this.l[i]-=this.spd[i]*7*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]);
            if(this.y[i]<10)
            {
                this.alive[i]=false;
            }
        }
    }
}

fruitObj.prototype.born=function(i){
    var aneID=Math.floor(Math.random() *ane.num);
    this.x[i]=ane.x[aneID];
    this.y[i]=canHeight-ane.len[aneID];
    this.l[i]=0;
}

提问者：mo小莫 2016-03-08 16:23

个回答

mmotiy: 2016-03-09 12:06:03

已采纳

fruitObj.prototype.draw=function(){
    for (var i=0;i<this.num;i++){
        //draw
        //find an ane,grow,fly up
        if(this.alive[i]){//as alive before
            if(this.l[i]<=14)
            {
                this.l[i]+=this.spd[i]*deltaTime;
            }
            else
            {
                this.l[i]-=this.spd[i]*7*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]);
            if(this.y[i]<10)
            {
                this.alive[i]=false;//as alive before
            }
        }
    }
}

xixi65

2017-05-20 17:12:33

想问下果实为什么出不来，请问是怎么解决的

0
慕UI1547199

2016-11-30 08:50:51

我也是怎么，请问是怎么解决的

0
qq_皮儿_0

2016-04-12 11:54:54

/**
* Created by lina.zheng on 2016/4/12.
*/
var fruitObj=function () {
this.alive=[]
this.x=[];
this.y=[];
this.l=[];
this.spd=[];
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=true;
this.x[i]=0;
this.y[i]=0;
this.l[i]=0;
this.spd[i]=Math.random()*0.01+0.005;//从0.005-0.015
this.bron(i);//所有果实出身
}
this.orange.src="./src/fruit.png"
this.orange.src="./src/blue.png"
}
fruitObj.prototype.draw=function () {
for(var i=0;i<this.num;i++) {
//画果实
if (this.alive[i]) {
if (this.l[i] <= 14) {
this.l[i] += this.spd[i] * deltaTime;
}
else {
this.y[i] -= this.spd[i] * 7 * 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]);
if (this.y[i] < 10) {
this.alive[i] = false;
}
}

}
}
//随机寻找海葵
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];
this.l[i]=0;
}

// fruitObj.prototype.update=function () {
// var num=0;
// for(var i=0;i<this.num;i++){
// if (this.alive[i])num++;
// }
// }

可以看出我哪边错了么我找了好久 if (this.alive[i]) {}这个一加进去就泡泡就出不来了

0
默小柒

2016-03-09 13:40:01

先打印一下this.l[i]和deltaTime结果是否是正确的

0