A = Point(yAxis)
B = Point(xAxis)
C = Point(zAxis)
planalpha = Plane(A, B, C)
G = (-6.081513355590648, 4.684063104859318, 0)
H = PointIn(planalpha)
d = Line(G, H)
v = OrthogonalLine(H, xOyPlane)
premierprojetantded = Plane(d, v)
i = IntersectPath(planalpha, premierprojetantded)
I = Intersect(d, planalpha)