beam1.k=[-1,0];
beam1.origin=[2,0.5];
beam1.face=NA;
beam1.intensity = 1;
beam1.polarization = 1; % 1 for s  and 2 for p

beam2=beam1;
beam1.polarization = 2; % 1 for s  and 2 for p


face1.vertex1=[-1,0];
face1.vertex2=[1,0];
face1.n_right = [1, 1];
face1.n_left= [2.4885, 2.7532];

face2.vertex1=[1,0];
face2.vertex2=[0,1];
face2.n_right = [1, 1];
face2.n_left= [2.4885, 2.7532];

face3.vertex1=[0,1];
face3.vertex2=[-1,0];
face3.n_right = [1, 1];
face3.n_left= [2.4885, 2.7532];

faces={face1,face2,face3};


border1.vertex1=[-2,-2];
border1.vertex2=[2,-2];
border1.n_right = [1, 1];
border1.n_left= [1, 1];

border2.vertex1=[2,-2];
border2.vertex2=[2,2];
border2.n_right = [1, 1];
border2.n_left= [1, 1];

border3.vertex1=[2,2];
border3.vertex2=[-2,2];
border3.n_right = [1, 1];
border3.n_left= [1, 1];

border4.vertex1=[-2,2];
border4.vertex2=[-2,-2];
border4.n_right = [1, 1];
border4.n_left= [1, 1];

borders={border1,border2, border3, border4};
beams={beam1,beam2};


img=zeros(1000,1000);
border_limits=[-2,-2, 2,2];
figure(1);
img = beam_trace(beams, faces, borders, border_limits, img );

fig_handle=2;
plot_beams_and_faces_figure(border_limits, img, faces, fig_handle );