Position du plan

Rayon = 5.7 (slider from 0 to 10, step 0.1)
position = -0.9 (slider from -3 to 12, step 0.1)
C = (0, 0, 0.1)
M: (0, 0, Rayon)
P: (0, 0, position)
horizontal = Plane(P, xOyPlane)
Opacité = 0.63 (slider from 0 to 1, step 0.01)
O: (0, 0, Rayon / 2)
s = Sphere(O, Rayon / 2)
Cercle = IntersectPath(horizontal, s)