Vector SP

a = 8 (slider from -10 to 10, step 1)
b = -1 (slider from -5 to 10, step 1)
c: 1
A: (a, b, c)
q = 1 (slider from -5 to 5, step 1)
r = 2 (slider from -5 to 5, step 1)
s = 4 (slider from -10 to 10, step 1)
B: (q, r, s)
u = Vector(A, B)
C: B - A
O: (0, 0, 0)
v = Vector(O, C)