绘制小鱼身体动画时出错，导致前面绘制的都出不来了

var babyObj = function()

{

this.x;

this.y;

this.angle;

this.babyTailTimer = 0;

this.babyTailCount = 0;

this.babyEyeTimer = 0;

this.babyEyeCount = 0;

this.babyEyeInterval = 1000;

this.babyBodeTimer = 0;

this.babyBodeCount = 0;

} 

babyObj.prototype.init = function()

{

this.x=canWidth*0.5 - 50;

this.y=canHeight*0.5 + 50;

this.angle=0;

}

babyObj.prototype.draw = function()

{

this.x=lerpDistance(mom.x,this.x,0.98);

this.y=lerpDistance(mom.y,this.y,0.98);

var deltaY=mom.y-this.y;

var deltaX=mom.x-this.x;

var beta = Math.atan2(deltaY,deltaX)+Math.PI;

this.angle = lerpAngle(beta,this.angle,0.6);

this.babyTailTimer += deltaTime;

if(this.babyTailTimer>50)

{

this.babyTailCount = (this.babyTailCount + 1)%8;

this.babyTailTimer%=50;

}

this.babyEyeTimer += deltaTime;

if(this.babyEyeTimer > this.babyEyeInterval)

{

this.babyEyeCount = (this.babyEyeCount + 1)%2;

this.babyEyeTimer%=this.babyEyeInterval;

if(this.babyEyeCount==0)

{

this.babyEyeInterval=Math.random()*1500+2000;

}else

{

this.babyEyeInterval=200;

}

}

this.babyBodeTimer += deltaTime;

if(this.babyBodeTimer > 300)

{

this.babyBodeCount = this.babyBodeCount+1;

this.babyBodeTimer%=300;

if(this.babyBodeCount>19)

{

this.babyBodeCount = 19; 

}

}

ctx1.save();

ctx1.translate(this.x, this.y);

ctx1.rotate(this.angle);

var babyTailCount = this.babyTailCount;

ctx1.drawImage(babyTail[babyTailCount],-babyTail[babyTailCount].width * 0.5+23,-babyTail[babyTailCount].height *0.5);

var babyBodeCount = this.babyBodeCount;

ctx1.drawImage(babyBode[babyBodeCount],-babyBode[babyBodeCount].width * 0.5,-babyBode[babyBodeCount].height *0.5);

var babyEyeCount = this.babyEyeCount;

ctx1.drawImage(babyEye[babyEyeCount],-babyEye[babyEyeCount].width * 0.5,-babyEye[babyEyeCount].height *0.5);

ctx1.restore();

}