Method cross

src/utilities/geometry/Vector3d.cpp:151–156

cross product with another Vector3d

/// cross product with another Vector3d
Vector3d Vector3d::cross(const Vector3d& other) const {
  double newX = (y() * other.z() - z() * other.y());
  double newY = (z() * other.x() - x() * other.z());
  double newZ = (x() * other.y() - y() * other.x());
  return {newX, newY, newZ};
}

/// get the Vector directly
Vector Vector3d::vector() const {