BUILDING OUTSIDE LIGHT INTENSITY VALUE CALCULATION PROGRAM AND LIGHT ENVIRONMENT ANALYSIS PROGRAM

PROBLEM TO BE SOLVED: To provide a program, a device and a system for simulating brightness inside a building, having an arithmetic processing means for exhaustively considering a degree of arrival of sunlight, and a degree of transmission or reflection in opening parts or an obstacle shielding light about a light intensity value arriving at the respective opening parts of the building from the outside. SOLUTION: This building outside light intensity value calculation program for calculating the light intensity value arriving at the building from the building outside comprises steps: for acquiring shape data of the building by a building information acquisition means; for detecting the building opening parts from the shape data of the building by an opening part detection means; for setting the celestial sphere to the building by an opening part light intensity value setting means, detecting all external light sources on the celestial sphere capable of being directly connected with virtual celestial light rays emitted from the building opening parts, and calculating and integrating the light intensity values of the external light sources; and for storing the light intensity value in building opening part information. COPYRIGHT: (C)2009,JPO&INPIT