Sonnenvektor SS2
SS2 = [10, 0, 2.5] - [6, 6, 5] = [4, -6, -2.5]
Virtueller Schattenpunkt
V = [6, 6, 5] + r·[4, -6, -2.5] = [x, y, 0] → r = 2 ∧ x = 14 ∧ y = -6 → V(14 | -6 | 0)
Schattenpunke S3 und S4
S3 = [8, 8, 0] + r·([14, -6, 0] - [8, 8, 0]) = [x, 0, 0] → r = 4/7 ∧ x = 80/7 = 11.43 → S3(11.43 | 0 | 0)
S4 = [4, 4, 0] + r·([14, -6, 0] - [4, 4, 0]) = [x, 0, 0] → r = 2/5 ∧ x = 8 → S4(8 | 0 | 0)