title: Why center of RenderTransformOrigin is 0.5,0.5?
body: <p>When I see samples codes where <code>RenderTransformOrigin</code> is used, they would have 0.5, 0.5 as the center instead of 0,0. </p>
  
  <p>I tried both and I don't see any differences. Is there a reason why 0.5,0.5 use used as center instead of 0,0?</p>