typename ForceDense<Derived>::Vector3 operator* (const ForceDense<Derived> & phi) { typedef typename ForceDense<Derived>::Vector3 Vector3; return Vector3(phi.linear()[0], phi.linear()[1], phi.angular()[2]); }
typename ForceDense<Derived>::ConstAngularType::template ConstFixedSegmentReturnType<1>::Type operator* (const ForceDense<Derived> & f) const { return f.angular().template segment<1>(axis); }