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#!/usr/bin/env python
"""Convert surface to BEM FIF file
Example usage
mne surf2bem --surf ${SUBJECTS_DIR}/${SUBJECT}/surf/lh.seghead --fif \
${SUBJECTS_DIR}/${SUBJECT}/bem/${SUBJECT}-head.fif --id=4
"""
from __future__ import print_function
# Authors: Alexandre Gramfort <alexandre.gramfort@telecom-paristech.fr>
#
# License: BSD (3-clause)
import sys
import mne
if __name__ == '__main__':
from mne.commands.utils import get_optparser
parser = get_optparser(__file__)
parser.add_option("-s", "--surf", dest="surf",
help="Surface in Freesurfer format", metavar="FILE")
parser.add_option("-f", "--fif", dest="fif",
help="FIF file produced", metavar="FILE")
parser.add_option("-i", "--id", dest="id", default=4,
help=("Surface Id (e.g. 4 sur head surface)"))
options, args = parser.parse_args()
if options.surf is None:
parser.print_help()
sys.exit(1)
print("Converting %s to BEM FIF file." % options.surf)
points, tris = mne.read_surface(options.surf)
points *= 1e-3
surf = dict(coord_frame=5, id=int(options.id), nn=None, np=len(points),
ntri=len(tris), rr=points, sigma=1, tris=tris)
mne.write_bem_surface(options.fif, surf)
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