$\vec{n}$

$\vec{u}$

n: (-3, 0, 4)
n0: n / 4
Q: (1, 2, 1)
u: (0, 1, 0)
Q0: Q - u
E: (((x, y, z) - (1, 2, 1)) * (-3, 0, 4)) = 0
P: (0.75, 1, -0.75)
P1: P + (2 * u)
g = Line(P, P1)
X = Point(g)
f = OrthogonalLine(X, E)
S = Intersect(f, E)
h = Segment(X, S)
Q1: Q + (0.5 * n)
w = Vector(Q, Q1)
b: abs(n)
i = OrthogonalLine(P, E)
v = Vector(P, P1)