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. Author manuscript; available in PMC: 2021 Jan 26.
Published in final edited form as: IEEE Trans Radiat Plasma Med Sci. 2019 May 22;4(1):63–80. doi: 10.1109/TRPMS.2019.2918222

Fig. 2.

Fig. 2.

Example calculation of I(x, θ). This example involves just two verticies a1 and a2 as shown. For the location x and direction θ indicated, ψi is angle between the line-of-sight from vertex ai to x and the plane perpendicular to θ. Here, I(x, θ) = tan ψ1.