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: circleArcToPolyline.m
    path of file: ./repos/matGeom/matGeom/geom2d
    
    the code of the file until where you have to start completion: function varargout = circleArcToPolyline(arc, N)
%CIRCLEARCTOPOLYLINE Convert a circle arc into a series of points.
%
%   P = circleArcToPolyline(ARC, N);
%   convert the circle ARC into a series of N points. 
%   ARC is given in the format: [XC YC R THETA1 DTHETA]
%   where XC and YC define the center of the circle, R its radius, THETA1
%   is the start of the arc and DTHETA is the angle extent of the arc. Both
%   angles are given in degrees. 
%   N is the number of vertices of the resulting polyline, default is 65.

    
function varargout = circleArcToPolyline(arc, N)
%CIRCLEARCTOPOLYLINE Convert a circle arc into a series of points.
%
%   P = circleArcToPolyline(ARC, N);
%   convert the circle ARC into a series of N points. 
%   ARC is given in the format: [XC YC R THETA1 DTHETA]
%   where XC and YC define the center of the circle, R its radius, THETA1
%   is the start of the arc and DTHETA is the angle extent of the arc. Both
%   angles are given in degrees. 
%   N is the number of vertices of the resulting polyline, default is 65.
%
%   The result is a N-by-2 array containing coordinates of the N points. 
%
%   [X Y] = circleArcToPolyline(ARC, N);
%   Return the result in two separate arrays with N lines and 1 column.
%
%
%   See also 
%   circles2d, circleToPolygon, drawCircle, drawPolygon
%

% ------
% Author: David Legland 
% E-mail: david.legland@inrae.fr
% Created: 2006-05-22
% Copyright 2006-2023 INRA - Cepia Software Platform

% default value for N
if nargin < 2
    N = 65;
end