function demo()
% demo of function splitEdges.m
% 
% input of splitEdges.m
%	edges - N-by-4 array, storing N line segments. 
%    		Each line segment (edges(i,:)) is given by coordinates 
%           of two points : [x1 y1 x2 y2]. 
%
% Written by Jiexian Ma at SUNY Binghamton (mjx0799@gmail.com)
%

    edges = [ 0 0 3.5 0; 
              2 0 3 0; 
              1 2 1 -1; 
              1 2 3 -1 ];
    new_edges = splitEdges( edges );
    
    figure;
    drawEdge( edges, 'linewidth', 3 );
    axis equal
    title( ['Number of edges = ', num2str( size(edges,1) ) ])
    figure;
    drawEdge( new_edges, 'linewidth', 3 );
    axis equal
    title( ['Number of edges = ', num2str( size(new_edges,1) ) ])
    
    drawnow;
    set(figure(1),'units','normalized', ...
        'position',[.05,.35,.30,.35]);
    set(figure(2),'units','normalized', ...
        'position',[.35,.35,.30,.35]);
end