t = 0 (slider from 0 to 14, step 0.01)
vTrasl = 0.8 (slider from 0 to 2, step 0.1)
ω = 1.3 (slider from 0 to 2.4, step 0.1)
β: 3.141592653589793 / 4.0 * (1.0 - cos(ω * t))
Spalla: (-(2.0) + vTrasl * t, 4.0)
MI: Spalla + (-(1.414), -(1.414))
Mano = Rotate(MI, β, Spalla)
α = Angle(MI, Spalla, Mano)
b = Segment(Spalla, Mano)