You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: read_stl.m
    path of file: ./repos/brainSurfer/scripts/HCP/cifti/ft_cifti/private
    
    the code of the file until where you have to start completion: function [pnt, tri, nrm] = read_stl(filename)

% READ_STL reads a triangulation from an ascii or binary *.stl file, which

    
function [pnt, tri, nrm] = read_stl(filename)

% READ_STL reads a triangulation from an ascii or binary *.stl file, which
% is a file format native to the stereolithography CAD software created by
% 3D Systems.
%
% Use as
%   [pnt, tri, nrm] = read_stl(filename)
%
% The format is described at http://en.wikipedia.org/wiki/STL_(file_format)
%
% See also WRITE_STL

% Copyright (C) 2006-2011, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org
% for the documentation and details.
%
%    FieldTrip is free software: you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation, either version 3 of the License, or
%    (at your option) any later version.
%
%    FieldTrip is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with FieldTrip. If not, see <http://www.gnu.org/licenses/>.
%
% $Id$

fid = fopen(filename, 'rt');

% read a small section to determine whether it is ascii or binary
% a binary STL file has an 80 byte asci header, followed by non-printable characters

section = fread(fid, 160, 'uint8');
fseek(fid, 0, 'bof');

if printableascii(section)
  % the first 160 characters are printable ascii, so assume it is an ascii format
  
  % solid   testsphere
  %   facet normal -0.13 -0.13 -0.98
  %     outer loop
  %       vertex 1.50000 1.50000 0.00000
  %       vertex 1.50000 1.11177 0.05111
  %       vertex 1.11177 1.50000 0.05111
  %     end