title: ARKit – What do the different columns in Transform Matrix represent?
body: <p>An <code>ARAnchor</code>'s 4x4 matrix has 4 columns. The fourth column of the matrix contains 3 translate values for <code>x</code>, <code>y</code>, and <code>z</code> coordinates.</p>
  <p>I was wondering what the other 3 columns represent?</p>