Calculate the distance of positions to inner skull surface.
array, shape (…, 3)
Position(s) in m, in head coordinates.
dict| instance of
If str, the path to the head<->MRI transform
*-trans.fif file produced
during coregistration. Can also be
'fsaverage' to use the built-in
If trans is None, an identity matrix is assumed.
Changed in version 0.19: Support for ‘fsaverage’ argument. If None (default), assumes bem is in head coordinates.
New in version 1.1.