title: Zooming an object based on mouse position
body: <p>I've got a large large Sprite, and I want to zoom in and out keeping mouse position as the pivot point, exactly how google maps or the photoshop zoom works, when you rotate the mouse wheel.</p>
  
  <p>To archieve the zoom effect I tween the scaleX and scaleY properties, but the fixed point is (0,0), while i need to be the mouse position (that changes everytime, of course).</p>
  
  <p>How can I change this?</p>
  
  <p>thanks.</p>