var fruitObj =function()
{
this.alive = [];
this.x = [];
this.y = [];
this.l = [];
this.spd =[];
this.fruitType=[];
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]=false;
this.x[i]=0;
this.y[i]=0;
this.spd[i] = Math.random()* 0.017+ 0.003;
this.fruitType[i]="";
}
this.orange.src = "./src/fruit.png";
this.blue.src = "./src/bule.png";
}
fruitObj.prototype.draw = function()
{
for(var i=0; i<this.num; i++)
{
if(this.alive[i])
{
if(this.fruitType[i]=="blue")
{
var pic = this.blue;
}
else
{
var pic = this.orange;
}
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;
}
}
}
}
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;
this.alive[i]=true;
var ran =Math.random();
if(ran < 0.2){
this.fruitType[i] = "blue";
}
else{
this.fruitType[i] = "orange";
}
}
function fruitMonitor()
{
var num = 0;
for(var i=0;i< fruit.num;i++)
{
if(fruit.alive[i]) num++;
}
if(num < 15 )
{
sendFruit();
return;
}
}
function sendFruit()
{
for(var i = 0; i< fruit.num; i++)
{
if(!fruit.alive[i])
{
fruit.born(i);
return;
}
}
}
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]);
把this.orange改成pic