Function _make_morph_map

mne/morph_map.py:180–204

Construct morph map from one subject to another. Note that this is close, but not exactly like the C version. For example, parts are more accurate due to double precision, so expect some small morph-map differences! Note: This seems easily parallelizable, but the overhead of pi

(subject_from, subject_to, subjects_dir, xhemi)

def _make_morph_map(subject_from, subject_to, subjects_dir, xhemi):
    """Construct morph map from one subject to another.

    Note that this is close, but not exactly like the C version.
    For example, parts are more accurate due to double precision,
    so expect some small morph-map differences!

    Note: This seems easily parallelizable, but the overhead
    of pickling all the data structures makes it less efficient
    than just running on a single core :(
    """
    subjects_dir = get_subjects_dir(subjects_dir)
    if xhemi:
        reg = "%s.sphere.left_right"
        hemis = (("lh", "rh"), ("rh", "lh"))
    else:
        reg = "%s.sphere.reg"
        hemis = (("lh", "lh"), ("rh", "rh"))

    return [
        _make_morph_map_hemi(
            subject_from, subject_to, subjects_dir, reg % hemi_from, reg % hemi_to
        )
        for hemi_from, hemi_to in hemis
    ]


def _make_morph_map_hemi(subject_from, subject_to, subjects_dir, reg_from, reg_to):