function plotQuadrature()
    global az_all el_all r_all
    
%     global file1_width file1_length file1_height
%     global file2_width file2_length file2_height
%     global file3_width file3_length file3_height
%     obj.shutUp = true;
%     obj        = setRAD(obj);
%     quadrature = getQuadrature(obj);
            
    [x,y,z] = sph2cart(az_all(:),el_all(:)-pi/2,r_all(:));
    %[x, y, z] = stoc(az,el,r)
%     x = [file1_width; file2_width; file3_width];
%     y = [file1_length; file2_length; file3_length];
%     z = [file1_height; file2_height; file3_height];
                
    colormap Gray;
                
    plot3(z(1,1),y(1,1),x(1,1),'marker','o','markerfacecolor','m','color','m','linestyle','none')
    hold on
    plot3(z(2,1),y(2,1),x(2,1),'marker','o','markerfacecolor','c','color','c','linestyle','none')
    hold on
    plot3(z(3,1),y(3,1),x(3,1),'marker','o','markerfacecolor','g','color','g','linestyle','none')
    
%     if size(x,1)>1500
%         plot3(x,y,z,'marker','.','markerfacecolor','g','color','g','linestyle','none')
%     else
%         plot3(x,y,z,'marker','o','markerfacecolor','g','color','g','linestyle','none')
%     end
            
    axis off; hold on; grid off; sphere; axis equal; rotate3d on; light;
    alpha(.1); lighting phong; hold off; set(gcf,'color','w');
           
    title({'Virtural Source Position';'M->Signal1, C->Signal2, G->Signal3'});
            
end