Schnittpunkt zwischen den Flächen und der Sichtgeraden
EDAB = gSH
[0, 0, 80] + r·([100, -100, 20] - [0, 0, 80]) + s·([20, 140, 120] - [0, 0, 80]) = [-70, -210, 100] + t·([210, -10, 0] - [-70, -210, 100]) --> r = 11/8 ∧ s = 53/88 ∧ t = 69/88 --> kein Problem
EDAB = gSI
[0, 0, 80] + r·([100, -100, 20] - [0, 0, 80]) + s·([20, 140, 120] - [0, 0, 80]) = [-70, -210, 100] + t·([130, 230, 0] - [-70, -210, 100]) --> r = 17/188 ∧ s = - 53/188 ∧ t = 69/188 --> kein Problem
EDBC = gSH
[0, 0, 80] + r·([20, 140, 120] - [0, 0, 80]) + s·([-60, -20, -20] - [0, 0, 80]) = [-70, -210, 100] + t·([210, -10, 0] - [-70, -210, 100]) --> r = - 171/143 ∧ s = - 11/26 ∧ t = 73/286 --> kein Problem
EDBC = gSI
[0, 0, 80] + r·([20, 140, 120] - [0, 0, 80]) + s·([-60, -20, -20] - [0, 0, 80]) = [-70, -210, 100] + t·([130, 230, 0] - [-70, -210, 100]) = r = - 56/113 ∧ s = - 17/226 ∧ t = 73/226 --> kein Problem