utv_probe

t3toolbox.backend.utv_sampling.utv_probe(ww, frame_data, variations_data)

def utv_probe(
        ww,               # probe vectors, len=d, ith elm_shape=W+(Ni,)
        frame_data,       # UT3Frame .data
        variations_data,  # UT3Variations .data
):  # -> MIRRORS ww: ragged -> len=d tuple (W+K+C+(Ni,)); packed -> (d,)+W+K+C+(N,)

Probe a uniform tangent vector (the bare 𝒥): mask-once, share probing.tv_probe. Mirrors ww’s packedness (ragged -> the d probes sliced to real widths; packed -> the packed array).