vx = p2-p1 = 100, 0, 0 -> normalized = 1, 0, 0
v = p3-p1 = 100, 100, 0 -> normalized = 0.707, 0.707, 0
vz = normalized(cross(vx,v)) = 0, 0, 1 https://www.wolframalpha.com/input/?i=norma…,(0.707,0.707,0))
vy = normalized(cross(vz,vx)) = 0, 1, 0 https://www.wolframalpha.com/input/?i=norma…s(0,0,1),(1,0,0))
1 0 0
-> R = 0 1 0
0 0 1
-> A = 0, B = 0, C = 0