Transform Matrix

Tutorial and explanation at the link: http://www.andreageremia.it/tutorial_matrix_transform.html

I've modified the Transform node of Nuke, adding a Matrix 4x4.

Now you can visualize the 2D Transformation with a Matrix.

Also, if you wish, just select the Transformation you want to visualize: Translate, Rotate or Scale.

This Matrix is good because you can understand how it works, but at the same time copy/paste the matrix to the extra_matrix knob in the CornerPin (for example).

If you check the results, you will get the same one in both of the nodes