momObj.prototype.draw = function(){


   var deltaY=my-this.y;
   var deltaX=mx-this.x;
   var beta = Math.atan2(deltaY,deltaX);
   //console.log(beta);
   //this.x=this.x*Math.cos(this.lastbeta-beta)+this.x*Math.sin(this.lastbeta-beta);
   //this.y=this.y*Math.sin(this.lastbeta-beta)+this.y*Math.cos(this.lastbeta-beta);
   //beta=Math.PI/2;
   //var mmx=mx*Math.cos(-beta)+my*Math.sin(-beta);
   //var mmy=mx*Math.sin(-beta)+my*Math.cos(-beta);

   this.x = lerpDistance(mx,this.x,0.9);
   this.y = lerpDistance(my,this.y,0.9);
   this.angle = lerpAngle(beta,this.angle,0.9);
   console.log(this.angle);
   ctx1.save();

   ctx1.translate(canWidth*0.5,canHeight*0.5);
   ctx1.rotate(this.angle);

   ctx1.drawImage(this.body,this.x-this.body.width*0.5,this.y-this.body.height*0.5);
   ctx1.drawImage(this.eye,this.x-this.eye.width*0.5,this.y-this.eye.height*0.5);
   ctx1.drawImage(this.tail,this.x-this.tail.width*0.5+30,this.y-this.tail.height*0.5);
   //this.lastbeta=beta;
   ctx1.restore();
}