OX=OP+t.d

t.d

t.d

O = Intersect(xAxis, yAxis)
P = (1, 5)
A = (3, 1)
d = Vector(O, A)
OP = Vector(O, P)
t = 1.7999999999999998 (slider from -5 to 5, step 0.01)
X: (x(P), y(P)) + (t x(d), t y(d))
td = Vector(P, X)
u = Vector(O, X)
B = Midpoint(X, O)
C: t d
v = Vector(O, C)
D = Midpoint(A, C)
E = Midpoint(P, X)