public static Vector3D Normalized(Vector3D a) {
return a*(1/a.Length());
}
public static double Project(Vector3D a,Vector3D b){
b=Normalized(b);
return Dot(a,b);
}
public static double Dot(Vector3D a, Vector3D b) {
return a.x*b.x+a.y*b.y+a.z*b.z;
}