60   inline Scalar x() const { return this->derived().coeffs().coeff(0); }  in x()
62   inline Scalar y() const { return this->derived().coeffs().coeff(1); }  in y()
64   inline Scalar z() const { return this->derived().coeffs().coeff(2); }  in z()
66   inline Scalar w() const { return this->derived().coeffs().coeff(3); }  in w()
69   inline Scalar& x() { return this->derived().coeffs().coeffRef(0); }  in x()
71   inline Scalar& y() { return this->derived().coeffs().coeffRef(1); }  in y()
73   inline Scalar& z() { return this->derived().coeffs().coeffRef(2); }  in z()
75   inline Scalar& w() { return this->derived().coeffs().coeffRef(3); }  in w()
78   inline const VectorBlock<const Coefficients,3> vec() const { return coeffs().template head<3>(); }  in vec()
81   inline VectorBlock<Coefficients,3> vec() { return coeffs().template head<3>(); }  in vec()
84 …const typename internal::traits<Derived>::Coefficients& coeffs() const { return derived().coeffs()…  in coeffs()  function
87   inline typename internal::traits<Derived>::Coefficients& coeffs() { return derived().coeffs(); }  in coeffs()  function
109   inline QuaternionBase& setIdentity() { coeffs() << 0, 0, 0, 1; return *this; }  in setIdentity()
114   inline Scalar squaredNorm() const { return coeffs().squaredNorm(); }  in squaredNorm()
119   inline Scalar norm() const { return coeffs().norm(); }  in norm()
123   inline void normalize() { coeffs().normalize(); }  in normalize()
126   inline Quaternion<Scalar> normalized() const { return Quaternion<Scalar>(coeffs().normalized()); }  in normalized()
133 …calar dot(const QuaternionBase<OtherDerived>& other) const { return coeffs().dot(other.coeffs()); }  in dot()
161   { return coeffs().isApprox(other.coeffs(), prec); }
271   { m_coeffs = other.coeffs().template cast<Scalar>(); }
276   inline Coefficients& coeffs() { return m_coeffs;}
277   inline const Coefficients& coeffs() const { return m_coeffs;}
353     EIGEN_STRONG_INLINE Map(const Scalar* coeffs) : m_coeffs(coeffs) {}
355     inline const Coefficients& coeffs() const { return m_coeffs;}
390     EIGEN_STRONG_INLINE Map(Scalar* coeffs) : m_coeffs(coeffs) {}
392     inline Coefficients& coeffs() { return m_coeffs; }
393     inline const Coefficients& coeffs() const { return m_coeffs; }
479   coeffs() = other.coeffs();
487   coeffs() = other.coeffs();
641     return Quaternion<Scalar>(conjugate().coeffs() / n2);
715   return Quaternion<Scalar>(scale0 * coeffs() + scale1 * other.coeffs());
752       q.coeffs().coeffRef(i) = Scalar(0.5) * t;
755       q.coeffs().coeffRef(j) = (mat.coeff(j,i)+mat.coeff(i,j))*t;
756       q.coeffs().coeffRef(k) = (mat.coeff(k,i)+mat.coeff(i,k))*t;
768     q.coeffs() = vec;