tv_unstack_tangent_stack
========================

.. py:function:: t3toolbox.backend.tv_operations.tv_unstack_tangent_stack(frame, variations)

   .. code-block:: python

      def tv_unstack_tangent_stack(
              frame,       # (UU, DD, LL, RR), each core stack = G
              variations,  # (VV, HH), each core stack = V + G
      ):  # -> array-like tree (shape V) of variations-data tuples (each stack = G)


   Peel the tangent stack V off the variations, returning a V-shaped tree of variation-data.

   The base point is shared across V, so the frame cores are untouched (the caller pairs the same
   frame with every leaf). Inverse of :py:func:`tv_stack_tangent_stack`.