DipendenzaProiettiva

N = Intersect(zAxis, xAxis)
f: y = 5
A = PointIn(f)
B = PointIn(f)
g = Line(A, B)
C = Point(g)
D = PointIn(f)
E = PointIn(f)
h = Line(D, E)
F = Point(h)
u = Vector(N, A)
v = Vector(N, B)
w = Vector(N, C)
a = Vector(N, D)
b = Vector(N, E)
c = Vector(N, F)
p = Plane(A, B, N)
q = Plane(D, E, N)
d = 1 (slider from 0 to 6, step 1)