Fix numerous doxygen issues in auto-link generation

Eigen/src/Geometry/Homogeneous.h

@@ -112,7 +112,7 @@ template<typename MatrixType,int _Direction> class Homogeneous
     typename MatrixType::Nested m_matrix;
 };
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \return an expression of the equivalent homogeneous vector
   *
@@ -131,7 +131,7 @@ MatrixBase<Derived>::homogeneous() const
   return HomogeneousReturnType(derived());
 }
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \returns a matrix expression of homogeneous column (or row) vectors
   *
@@ -146,7 +146,7 @@ VectorwiseOp<ExpressionType,Direction>::homogeneous() const
   return HomogeneousReturnType(_expression());
 }
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \returns an expression of the homogeneous normalized vector of \c *this
   *
@@ -164,7 +164,7 @@ MatrixBase<Derived>::hnormalized() const
     ColsAtCompileTime==1?1:size()-1) / coeff(size()-1);
 }
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \returns an expression of the homogeneous normalized vector of \c *this
   *

Eigen/src/Geometry/OrthoMethods.h

@@ -13,7 +13,7 @@
 
 namespace Eigen { 
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \returns the cross product of \c *this and \a other
   *
@@ -26,7 +26,11 @@ namespace Eigen {
   */
 template<typename Derived>
 template<typename OtherDerived>
+#ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename MatrixBase<Derived>::template cross_product_return_type<OtherDerived>::type
+#else
+inline typename MatrixBase<Derived>::PlainObject
+#endif
 MatrixBase<Derived>::cross(const MatrixBase<OtherDerived>& other) const
 {
   EIGEN_STATIC_ASSERT_VECTOR_SPECIFIC_SIZE(Derived,3)
@@ -63,7 +67,7 @@ struct cross3_impl {
 
 }
 
-/** \geometry_module
+/** \geometry_module \ingroup Geometry_Module
   *
   * \returns the cross product of \c *this and \a other using only the x, y, and z coefficients
   *
@@ -90,14 +94,14 @@ MatrixBase<Derived>::cross3(const MatrixBase<OtherDerived>& other) const
                         typename internal::remove_all<OtherDerivedNested>::type>::run(lhs,rhs);
 }
 
-/** \returns a matrix expression of the cross product of each column or row
+/** \geometry_module \ingroup Geometry_Module
+  *
+  * \returns a matrix expression of the cross product of each column or row
   * of the referenced expression with the \a other vector.
   *
   * The referenced matrix must have one dimension equal to 3.
   * The result matrix has the same dimensions than the referenced one.
   *
-  * \geometry_module
-  *
   * \sa MatrixBase::cross() */
 template<typename ExpressionType, int Direction>
 template<typename OtherDerived>
@@ -207,7 +211,9 @@ struct unitOrthogonal_selector<Derived,2>
 
 } // end namespace internal
 
-/** \returns a unit vector which is orthogonal to \c *this
+/** \geometry_module \ingroup Geometry_Module
+  *
+  * \returns a unit vector which is orthogonal to \c *this
   *
   * The size of \c *this must be at least 2. If the size is exactly 2,
   * then the returned vector is a counter clock wise rotation of \c *this, i.e., (-y,x).normalized().

Eigen/src/Geometry/Scaling.h

@@ -104,6 +104,9 @@ public:
 
 };
 
+/** \addtogroup Geometry_Module */
+//@{
+
 /** Concatenates a linear transformation matrix and a uniform scaling */
 // NOTE this operator is defiend in MatrixBase and not as a friend function
 // of UniformScaling to fix an internal crash of Intel's ICC
@@ -136,8 +139,6 @@ template<typename Derived>
 static inline const DiagonalWrapper<const Derived> Scaling(const MatrixBase<Derived>& coeffs)
 { return coeffs.asDiagonal(); }
 
-/** \addtogroup Geometry_Module */
-//@{
 /** \deprecated */
 typedef DiagonalMatrix<float, 2> AlignedScaling2f;
 /** \deprecated */