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1 Stark, Michael M.Vertex-Based formulations of Irradiance from polygonal sourcesIrradiance at a point on a receiver due to a uniformly emitting polygon luminaire, or equivalently, the differential area to polygon form factor, is of fundamental interest in computer graphics. An elegant closed-form expression attributed to Lambert, dating from the 18th century, is the most common...Vertex; Irradiance; polygon luminaire; computer graphics2000
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