请教下，为什么海葵和果实的摆动幅度不一致啊
var aneObj = function()
{
this.rootx = [];
this.headx = [];
this.heady = [];
this.amp = [];
this.alpha = 0;
}
aneObj.prototype.num = 50;
aneObj.prototype.init = function()
{
for (var i = 0; i < this.num; i++)
{
this.rootx[i] = i*16+Math.random() * 20;
this.headx[i] = this.rootx[i];
this.heady[i] = canHeight - 250+Math.random()*50;
this.amp[i] = Math.random() * 50 + 10;
}
}
aneObj.prototype.draw = function()
{
this.alpha += deltaTime * 0.0008;
var l = Math.sin(this.alpha);
ctx2.save();
ctx2.globalAlpha=0.6;
ctx2.lineWidth = 20;
ctx2.lineCap = "round"
ctx2.strokeStyle = "#3b154e";
for(var i=0;i<this.num;i++)
{
ctx2.beginPath();
ctx2.moveTo(this.rootx[i],canHeight);
this.headx[i] = this.rootx[i] + l * this.amp[i];
ctx2.quadraticCurveTo(this.rootx[i],canHeight - 120,this.headx[i] + l * this.amp[i],this.heady[i]);
ctx2.stroke();
}
ctx2.restore();
}
var fruitObj = function()
{
this.alive = [];
this.x=[];
this.y=[];
this.aneNO = [];
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.aneNO[i] = 0;
this.spd[i] = Math.random() * 0.017+0.003;
this.fruitType[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.fruitType[i] == "blue")
{
var pic = this.blue;
}
else
{
var pic = this.orange;
}
if(this.l[i] <=14)
{
var NO = this.aneNO[i];
this.x[i] = ane.headx[NO];
this.y[i] = ane.heady[NO];
this.l[i] += this.spd[i] * deltaTime;
}
else
{
this.y[i] -= this.spd[i] * 7 * deltaTime;
}
ctx2.drawImage(pic, 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)
{
this.aneNO[i] = Math.floor(Math.random() * ane.num);
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";
}
}
fruitObj.prototype.dead=function(i)
{
this.alive[i]=false;
}
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;
}
}
}
