title: What do the values in the ARCamera transform matrix_identity_float4x4 represent?
body: <p>I have been experimenting with ARKit and saw that the 4x4 matrix from the <code>ARCamera().transform</code> property is very lightly documented and was wondering if anyone had any insight into what each column/row in the matrix represented? I was able to gather from the WWDC video that column 3 is for x y and z translations but I wasn't able to find documentation on the rest of the values. Any help figuring this out would be greatly appreciated.</p>