public static Shape ArrowR(int n,
double lineLn = 1, double lineR = 0.01,
double arrowLn = 0.05, double arrowR = 0.02) =>
(
(
(Surfaces.Cylinder(n, 2) + Surfaces.Circle(n, 2)).Scale(lineR, lineR, lineLn) +
(Surfaces.Circle(n, 2) + Surfaces.ConeM(n, 2).Move(0, 0, 1)).Scale(arrowR, arrowR, arrowLn).Move(0, 0, lineLn)
)
).Normalize();
