Light environment simulator, light environment simulation method, program

摘要

The amount of calculation is suppressed while performing a simulation considering reflection of individual elements. The light environment simulator (10) includes a dividing unit (13), a classification unit (14), a first calculation unit (151), a second calculation unit (152), a storage unit (12), a change unit (16), and a third unit. And a calculation unit (153). The classification unit (14) divides the plurality of individual elements into a plurality of first elements that directly receive light energy incident on the room (20) from the outside and a plurality of second elements that receive light energy from other individual elements. Divide. A 2nd calculation part (152) calculates | requires the form factor between several 2nd element and an individual element. The storage unit (12) stores a form factor in association with each of the plurality of second elements. In the third calculation unit (153), when the changing unit (16) changes the incident condition, the storage unit (12) stores the individual elements that are commonly divided into the first elements before and after the change. The intensity of light energy from the second element is calculated using the form factor.