title: What does it mean to "preconcat" a matrix in Android?
body: <p>In reviewing: <a href="http://developer.android.com/reference/android/graphics/Canvas.html" rel="noreferrer">http://developer.android.com/reference/android/graphics/Canvas.html</a></p>
  
  <p>I'm wondering</p>
  
  <p>translate(): "preconcat the current matrix with the specified translation" -- what does this mean?</p>
  
  <p>I can't find a good definition of "preconcat" anywhere on the internet! The only place I can find it is in the Android Source - I'm starting to wonder if they made it up? :) </p>
  
  <p>I'm familiar with "concat" or concatenate, which is to append to, so what is a pre-concat?</p>