2Lapp_Fläche_minus45_Grad_rotiert

g(x, y) = If[sqrt(x^(2) + y^(2)) ≤ 1, 0]
c = Surface(cos(t), sin(t), ((h * 2) * (cos(t))^(2)), t, 0, (2 * pi), h, 0, 1)
d(x, y) = If[sqrt(x^(2) + y^(2)) ≤ 1, (1 / 2 * (x + y - ((-x) + y))^(2))]
d' = Rotate(d, -45°)
f = Segment((0, 0), (1, 1))