Shading factor table

The execution of the shading factor calculation may take some time, and has to be evaluated at each simulation hour.

For speeding-up the simulation execution, we calculate a table of shading factors for specific sky orientations (every 10° in tilt and 20° in azimuth). Then at each step, the simulation can calculate the exact sun's position, and interpolate in this table ("Fast" shadings calculation").

This table is also used for the elaboration of the shading factor on diffuse and on albedo integrals.

The shading factor table is elaborated for all 3D fields of an orientation object.