fruit的問(wèn)題，怎么這一節(jié)問(wèn)題這么少
var?fruitObject=function(){
this.alive=[];//boolean
this.orange=new?Image();
this.blue=new?Image();
this.x=[];
this.y=[];
}
fruitObject.prototype.num=30;
fruitObject.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";
}
fruitObject.prototype.draw=function(){
for(var?i=0;i<this.name;i++){
ctx2.drawImage(this.orange,this.x[i],this.y[i]);
}
}
fruitObject.prototype.born=function(i){
var?aneid=Math.floor(Math.random()*ane.num);
this.x[i]=ane.x[aneid];
this.y[i]=canHeight-ane.length[aneid];
?
}
var?can1;
var?can2;
var?ctx1;
var?ctx2;
var?canWidth;
var?canHeight;
var?lastTime;
var?deltaTime;
var?ane;
var?fruit;
var?bgPic=new?Image();
document.body.onload=game;
function?game()
{
init();
lastTime=Date.now();
deltaTime=0;
gameloop();
}
function?init(){
//獲得canves?context
can1=document.getElementById("canvas1");//fishes,dust,ui
ctx1=can1.getContext('2d');
can2=document.getElementById("canvas2");
ctx2=can2.getContext('2d');
bgPic.src="./src/background.jpg";
canWidth=can1.width;
????canHeight=can1.height;
????ane=new?aneObject();
????ane.init();
????fruit=new?fruitObject();
????fruit.init();
}
function?gameloop(){
requestAnimFrame(gameloop);
var?now=Date.now();
deltaTime=now-lastTime;
lastTime=now;
drawbackground();
ane.draw();
fruit.draw();
}
<!DOCTYPE?HTML>
<html>
<head>
<meta?charset="utf-8">
<title>愛(ài)心魚(yú)</title>
<style?type="text/css">
body{
padding-top:?10px;
}
.all_bg{
width:?800px;
height:?600px;
margin:?0px?auto;
}
.allCanves{
position:?relative;;
width:?800px;
height:?600px;
margin:?0px;
}
#canves1{
position:?absolute;
bottom:?0;
left:?0;
z-index:?1;
}
#canves2{
position:?absolute;
bottom:?0;
left:?0;
z-index:?0;
}
</style>
</head>
<body>
<div?class="all_bg">
<div?id="allCanves">
<canvas?id="canvas1"?width="800"?height="600"></canvas>
<canvas?id="canvas2"?width="800"?height="600"></canvas>
</div>
</div>
<script?type="text/javascript"?src="js/main.js"></script>
<script?type="text/javascript"?src="js/commonFunctions.js"></script>
<script?type="text/javascript"?src="js/background.js"></script>
<script?type="text/javascript"?src="js/ane.js"></script>
<script?type="text/javascript"?src="js/fruit.js"></script>
</body>
</html>代碼沒(méi)有報(bào)錯(cuò)了 但是就是不顯示fruit怎么辦
2016-01-07
fruitObject.prototype.draw=function(){ ????for(var?i=0;i<this.name;i++){?????//應(yīng)該是i<this.num ????????ctx2.drawImage(this.orange,this.x[i],this.y[i]); ? ????} ? }