C: (3, 1, -4)
O: (0, 0, 0)
A = (-1, 2.1, 3)
B = (0, -0.9, 2)
D: (0, 2, 5)
u = Vector(O, C)
v = Vector(O, D)
p = Plane(O, D, C)
n: u ⊗ v
d = Line(B, A)
I = Intersect(d, p)
w = Vector(A, I)
a = Vector(A, B)