public static Vecto3D Bisection(Vecto3D v1, Vecto3D v2) { return((v1 * v2.Getlength()) + (v2 * v1.Getlength())); }
public static double Angle(Vecto3D v1, Vecto3D v2) { return(Math.Acos((v1 * v2) / (v1.Getlength() * v2.Getlength()))); }