fiff_ch_pos.h File Reference

Coil-frame position record embedded inside FIFF_CH_INFO: coil location and 3x3 EX/EY/EZ orientation triad. More...

#include "fiff_global.h"
#include "fiff_types.h"
#include <QSharedPointer>
#include <memory>

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Classes
class	FIFFLIB::FiffChPos
	Channel coil-frame placement: origin r0 (m) and orthonormal axes ex / ey / ez in FIFFV_COORD_DEVICE. More...

Namespaces
namespace	FIFFLIB
	FIFF file I/O, in-memory data structures and high-level readers/writers.

Functions
bool	FIFFLIB::operator== (const FiffChPos &a, const FiffChPos &b)

Detailed Description

Coil-frame position record embedded inside FIFF_CH_INFO: coil location and 3x3 EX/EY/EZ orientation triad.

SPDX-License-Identifier: BSD-3-Clause Copyright (c) 2012-2026 MNE-CPP Authors

Author

Christoph Dinh chris.nosp@m.toph.nosp@m..dinh.nosp@m.@mne.nosp@m.-cpp..nosp@m.org; Christof Pieloth pielo.nosp@m.th@l.nosp@m.abp.h.nosp@m.twk-.nosp@m.leipz.nosp@m.ig.d.nosp@m.e; Lorenz Esch loren.nosp@m.z.es.nosp@m.ch@tu.nosp@m.-ilm.nosp@m.enau..nosp@m.de; Juan GPC jgarc.nosp@m.iapr.nosp@m.ieto@.nosp@m.mgh..nosp@m.harva.nosp@m.rd.e.nosp@m.du; Gabriel Motta gabri.nosp@m.elbe.nosp@m.nmott.nosp@m.a@gm.nosp@m.ail.c.nosp@m.om

Since

0.1.0

Date

October 2012

A FIFF channel info record carries a sub-record describing where the sensing element sits in the device coordinate frame (FIFFV_COORD_DEVICE) and how it is oriented. FiffChPos owns that sub-record: a 3-vector r0 with the coil origin in metres plus three orthonormal 3-vectors ex, ey, ez encoding the coil-local axes (typically used by the forward solution to integrate over the coil pickup area).

Field layout matches the fiffChPosRec struct exactly so the record can be streamed without per-field marshalling, and it is the C++ counterpart of the loc array stored in mne.io.Info channel entries in MNE-Python.

Definition in file fiff_ch_pos.h.