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: torusMesh.m
    path of file: ./repos/matGeom/matGeom/meshes3d
    
    the code of the file until where you have to start completion: function varargout = torusMesh(torus, varargin)
%TORUSMESH Create a 3D mesh representing a torus.
%
%   [V, F] = torusMesh(TORUS)
%   Converts the torus in TORUS into a face-vertex quadrangular mesh.
%   TORUS is given by [XC YC ZY R1 R2 THETA PHI]
%   where (XC YZ ZC) is the center of the torus, R1 is the main radius, R2
%   is the radius of the torus section, and (THETA PHI) is the angle of the
%   torus normal vector (both in degrees).
%
%   [V, F] = torusMesh(TORUS, 'nTheta', NT, 'nPhi', NP)
%   Creates a mesh using NP circles, each circle being discretized with NT
%   vertices. Default are 60 for both parameters.
%
%   [V, F] = torusMesh()
%   Creates a mesh representing a default torus.
%
%   Example
%     [v, f] = torusMesh([50 50 50  30 10  30 45]);
%     figure; drawMesh(v, f, 'linestyle', 'none');
%     view(3); axis equal; 
%     lighting gouraud; light;
%
%
%   See also 

    
function varargout = torusMesh(torus, varargin)
%TORUSMESH Create a 3D mesh representing a torus.
%
%   [V, F] = torusMesh(TORUS)
%   Converts the torus in TORUS into a face-vertex quadrangular mesh.
%   TORUS is given by [XC YC ZY R1 R2 THETA PHI]
%   where (XC YZ ZC) is the center of the torus, R1 is the main radius, R2
%   is the radius of the torus section, and (THETA PHI) is the angle of the
%   torus normal vector (both in degrees).
%
%   [V, F] = torusMesh(TORUS, 'nTheta', NT, 'nPhi', NP)
%   Creates a mesh using NP circles, each circle being discretized with NT
%   vertices. Default are 60 for both parameters.
%
%   [V, F] = torusMesh()
%   Creates a mesh representing a default torus.
%
%   Example
%     [v, f] = torusMesh([50 50 50  30 10  30 45]);
%     figure; drawMesh(v, f, 'linestyle', 'none');
%     view(3); axis equal; 
%     lighting gouraud; light;
%
%
%   See also 
%     meshes3d, drawTorus, revolutionSurface, cylinderMesh, sphereMesh
%     drawMesh

% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2012-10-25, using Matlab 7.9.0.529 (R2009b)
% Copyright 2012-2023 INRA - Cepia Software Platform

%% Extract data for torus

% check input number
if nargin == 0
    torus = [0 0 0  30 10  0 0];
elseif ischar(torus)
    varargin = [{torus} varargin];
    torus = [0 0 0  30 10  0 0];
end