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: tess_isosurface.m
    path of file: ./repos/brainstorm3/toolbox/anatomy
    
    the code of the file until where you have to start completion: function [MeshFile, iSurface] = tess_isosurface(iSubject, isoValue, Comment)
% TESS_ISOSURFACE: Reconstruct a thresholded surface mesh from a CT
%
% USAGE:  [MeshFile, iSurface] = tess_isosurface(iSubject, isoValue, Comment)
%         [MeshFile, iSurface] = tess_isosurface(iSubject)
%         [MeshFile, iSurface] = tess_isosurface(CtFile,  isoValue, Comment)
%         [MeshFile, iSurface] = tess_isosurface(CtFile)
%         [Vertices, Faces]    = tess_isosurface(sMri,     isoValue)
%         [Vertices, Faces]    = tess_isosurface(sMri)
%
% INPUT:
%    - iSubject    : Indice of the subject where to add the surface
%    - isoValue    : The value in Housefield Unit to set for thresholding the CT. If this parameter is empty, then a GUI pops up asking the user for the desired value
%    - Comment     : Surface description
% OUTPUT:
%    - MeshFile : indice of the surface that was created in the sSubject structure
%    - iSurface : indice of the surface that was created in the sSubject structure
%    - Vertices : The vertices of the mesh

    
function [MeshFile, iSurface] = tess_isosurface(iSubject, isoValue, Comment)
% TESS_ISOSURFACE: Reconstruct a thresholded surface mesh from a CT
%
% USAGE:  [MeshFile, iSurface] = tess_isosurface(iSubject, isoValue, Comment)
%         [MeshFile, iSurface] = tess_isosurface(iSubject)
%         [MeshFile, iSurface] = tess_isosurface(CtFile,  isoValue, Comment)
%         [MeshFile, iSurface] = tess_isosurface(CtFile)
%         [Vertices, Faces]    = tess_isosurface(sMri,     isoValue)
%         [Vertices, Faces]    = tess_isosurface(sMri)
%
% INPUT:
%    - iSubject    : Indice of the subject where to add the surface
%    - isoValue    : The value in Housefield Unit to set for thresholding the CT. If this parameter is empty, then a GUI pops up asking the user for the desired value
%    - Comment     : Surface description
% OUTPUT:
%    - MeshFile : indice of the surface that was created in the sSubject structure
%    - iSurface : indice of the surface that was created in the sSubject structure
%    - Vertices : The vertices of the mesh
%    - Faces    : The faces of the mesh
%         
% If input is loaded CT structure, no surface file is created and the surface vertices and faces are returned instead.
%
% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
% 
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPLv3
% license can be found at http://www.gnu.org/copyleft/gpl.html.
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%
% For more information type "brainstorm license" at command prompt.
% =============================================================================@
%
% Inspired by tess_isohead.m
%
% Authors: Chinmay Chinara, 2023-2024

%% ===== PARSE INPUTS =====
% Initialize returned variables
MeshFile = [];
iSurface = [];
isSave = true;

% Parse inputs
if (nargin < 3) || isempty(Comment)
    Comment = [];
end