🏜️ Saharan Courtyard Sun Path: Wall Shadow and Floor Shade Fraction (2D)

Plan view of a walled desert courtyard in which the walls throw a moving shadow across the floor as the sun crosses the sky. Set the latitude, the day of the year, the courtyard width and length, the wall height and the floor reflectance, and see the sun height and azimuth, the share of the floor in sun, the mean shade over the day and the sunlight the floor absorbs. The wall shadow geometry, the noon sun height, the daily energy sum and the limits of very low and very high walls are checked numerically, with four in-page numerical checks.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install