It is told to be computed for an angle of 2PI rad, but what I found from the output data is that the "cell-volume" is the integral value of "cell-volume-2d" for an angle of 1 rad.  For example, when "cell-volume-2d" is 2.5e-9 m^2 and "y-coordinate" is 1e-3 m, the "cell-volume" is 2.5e-12 m^3, which has not timed a 2PI. 

For other quantities, I can't verify them as I only find integral data. I am wondering if they are integral values for 2PI rad or 1 rad.