var fruitObj = function ()
{
this.alive = [];//bool
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[i] = false;
this.x[i] = 0;
this.y[i] = 0;
this.l[i] = 0;
this.spd[i] = Math.random()*0.005+0.005;//[0.05,0.15)
//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++)
{
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;
}
}
}
}
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 = true;
}
function fruitMonitor(){//多少活着果实
var num = 0;
for (var i = 0; i < fruit.num; i++)
{
if(fruit.alive[i]) num++;
}
if(num<15)
{
sendFruit();
return;
}
}
function sendFruit(){
console.log("121212121");
for (var i = 0; i<fruit.num;i++)
{
if(!fruit.alive[i])
{
fruit.born(i);
return;
}
}
}
这一段的this.alive = true 改成 this.alive[i] = true
在此处有问题