title: What Happens When Setting transform.up in Unity
body: <p>What happens when I set the transform.up value in unity. Specifically could you explain this video in the link below</p>
  
  <p><a href="https://youtu.be/_XdqA3xbP2A" rel="nofollow noreferrer">https://youtu.be/_XdqA3xbP2A</a></p>
  
  <p>I know it changes what the object is looking at. But, does it look at a position, or how does it 
  work? What happens when I change the direct transform.up?  I can’t seem to find a good explanation. Why does the vector in the video make a direction that is facing the mouse, why not use the mousePosition itself instead of subtracting?</p>
  
  <p>Aside from that could you also explain what is going on in the video?</p>
  
  <p>Thanks in advance!</p>