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Unformatted text preview: function ctf_write_headshape(HeadShape,mri,file) % ctf_write_headshape - write a CTF .shape file % % ctf_write_headshape(HeadShape,mri,file) % % - HeadShape is Nx3 list of coordinates in the CTF head shape coordinates. % - mri is a struct returned by ctf_read_mri; if it is empty, this function % will prompt with a file browser and read in the file identified. The mri % struct contains the mri.file field, which is used to define the name of % the .shape and the .shape_info output files (unless the optional 'file' % input is given). Also, the fiducials and other information in this % struct are required to output the .shape_info file. The .shape and % .shape_info files are required to import the data into CTF's MRIViewer. % % The *.shape file is an ascii text file in the following format: % % Number of Points % x1 y1 z1 % x2 y2 z2 % . % . % . % xn yn zn % % These vertex coordinates are contained in the input HeadShape % matrix (Nx3). The coordinate values must be in centimeters in % either the voxel MRI coordinate system or the MEG Head Coordinate % System (see ctf_read_mri for more about the coordinate system). % % This function assumes the MEG head coordinate system is required. % The values in the input HeadShape matrix (Nx3) should be in % centimeteres, with the column values representing X, Y, Z, such % that +X is toward the nasion, +Y is left preauricular and +Z is % superior. The values are given with respect to the origin, which % lies half way between the left and right preauricular fiducials. % lies half way between the left and right preauricular fiducials....
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- Spring '10