utv_entries

t3toolbox.backend.utv_sampling.utv_entries(index, frame_data, variations_data)

def utv_entries(
        index,            # int array, shape=(d,)+W -- the (stack W of) multi-indices
        frame_data,       # UT3Frame .data
        variations_data,  # UT3Variations .data
):  # -> scalar entries, shape=W+K+C

Entries of a uniform tangent vector at index (the bare 𝒥; fiber slicing, no packing – the real indices index_i < Ni never reach the mode padding).