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function saveoff(v, f, fname)
%
% saveoff(v,f,fname)
%
% save a surface mesh to Geomview Object File Format (OFF)
%
% author: Qianqian Fang, <q.fang at neu.edu>
% date: 2007/03/28
%
% input:
% v: input, surface node list, dimension (nn,3)
% f: input, surface face element list, dimension (be,3)
% fname: output file name
%
% -- this function is part of iso2mesh toolbox (http://iso2mesh.sf.net)
%
fid = fopen(fname, 'wt');
if (fid == -1)
error('You do not have permission to save mesh files.');
end
fprintf(fid, 'OFF\n');
fprintf(fid, '%d\t%d\t%d\n', length(v), length(f), 0);
fprintf(fid, '%.16f\t%.16f\t%.16f\n', v');
face = [size(f, 2) * ones(size(f, 1), 1) f - 1];
format = [repmat('%d\t', 1, size(face, 2) - 1) '%d\n'];
fprintf(fid, format, face');
fclose(fid);
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