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FiffDigPoint

Namespace: FIFFLIB  ·  Library: FIFF Library

#include <fiff/fiff_dig_point.h>

class FIFFLIB::FiffDigPoint

One digitizer point: kind (cardinal/HPI/EEG/extra), ident, 3D position in FIFFV_COORD_HEAD.

Field layout matches fiffDigPointRec on disk. The (kind, ident) pair is the lookup key used everywhere else in the codebase — for example, the LPA/Nasion/RPA fiducials are found by searching for kind == FIFFV_POINT_CARDINAL and ident == 1 / 2 / 3.

src/examples/ex_fiff_api/main.cpp
FiffDigPointSet digitizer(info.dig);                                    // 146 points in head coordinates
FiffDigPointSet cardinal = digitizer.pickTypes({FIFFV_POINT_CARDINAL}); // LPA, nasion, RPA

Public Methods​

FiffDigPoint()​

Constructs the digitization point description.

~FiffDigPoint()​

Destroys the digitization point description.

Static Methods​

storageSize()​

Size of the old struct (fiffDigPointRec) 5int = 54 = 20.

Returns:

  • qint32 — the size of the old struct fiffDigPointRec.

Example​

Used in examples​

ex_fiff_api​

FIFF library: measurement info, channels, digitizer, transforms, projectors, covariance, events,.

src/examples/ex_fiff_api/main.cpp, line 126
// mne: 146 points; dig[0] = LPA at (-0.0713766, 0, 5.1e-9)
ok &= expect(digitizer.size() == 146 && cardinal.size() == 3 && cardinal[0].ident == FIFFV_POINT_LPA && std::fabs(cardinal[0].r[0] + 0.07137661f) < 1e-7f,
             "FiffDigPointSet/FiffDigPoint: 146 points, LPA at x = -71.38 mm");

Authors of this file​