utv_stack_tangent_stack

t3toolbox.backend.utv_operations.utv_stack_tangent_stack(variations_tree)

def utv_stack_tangent_stack(
        variations_tree,  # array-like tree (shape K) of variations .data tuples (each stack = C)
):  # -> variations .data tuple (stack = K + C)

Stack a K-shaped tree of variation-.data over the tangent stack K (outermost; C stays inner). Inverse of utv_unstack_tangent_stack(). The leaves share one frame, so ranks are uniform across K (the masks, constant along K, just replicate).