Added an automatically generated list of selected examples in the documentation.

Added the custom gemetry_module tag, and use it.

Eigen/src/Geometry/AngleAxis.h

@@ -25,9 +25,11 @@
 #ifndef EIGEN_ANGLEAXIS_H
 #define EIGEN_ANGLEAXIS_H
 
-/** \class AngleAxis
+/** \geometry_module \ingroup Geometry
   *
-  * \brief Represents a rotation in a 3 dimensional space as a rotation angle around a 3D axis
+  * \class AngleAxis
+  *
+  * \brief Represents a 3D rotation as a rotation angle around an arbitray 3D axis
   *
   * \param _Scalar the scalar type, i.e., the type of the coefficients.
   *
@@ -35,7 +37,7 @@
   * \li \c AngleAxisf for \c float
   * \li \c AngleAxisd for \c double
   *
-  * \sa class Quaternion, class EulerAngles, class Transform
+  * \sa class Quaternion, class Transform
   */
 template<typename _Scalar>
 class AngleAxis

Eigen/src/Geometry/Cross.h

@@ -25,7 +25,8 @@
 #ifndef EIGEN_CROSS_H
 #define EIGEN_CROSS_H
 
-/** \returns the cross product of \c *this and \a other */
+/** \geometry_module
+  * \returns the cross product of \c *this and \a other */
 template<typename Derived>
 template<typename OtherDerived>
 inline typename ei_eval<Derived>::type

Eigen/src/Geometry/Quaternion.h

@@ -30,7 +30,9 @@ template<typename Other,
          int OtherCols=Other::ColsAtCompileTime>
 struct ei_quaternion_assign_impl;
 
-/** \class Quaternion
+/** \geometry_module \ingroup Geometry
+  *
+  * \class Quaternion
   *
   * \brief The quaternion class used to represent 3D orientations and rotations
   *
@@ -48,7 +50,7 @@ struct ei_quaternion_assign_impl;
   * \li \c Quaternionf for \c float
   * \li \c Quaterniond for \c double
   *
-  * \sa  class AngleAxis, class EulerAngles, class Transform
+  * \sa  class AngleAxis, class Transform
   */
 template<typename _Scalar>
 class Quaternion

Eigen/src/Geometry/Rotation.h

@@ -28,7 +28,9 @@
 // this file aims to contains the various representations of rotation/orientation
 // in 2D and 3D space excepted Matrix and Quaternion.
 
-/** \class ToRotationMatrix
+/** \geometry_module
+  *
+  * \class ToRotationMatrix
   *
   * \brief Template static struct to convert any rotation representation to a matrix form
   *
@@ -101,7 +103,9 @@ struct ToRotationMatrix<Scalar, Dim, MatrixBase<OtherDerived> >
   }
 };
 
-/** \class Rotation2D
+/** \geometry_module
+  *
+  * \class Rotation2D
   *
   * \brief Represents a rotation/orientation in a 2 dimensional space.
   *

Eigen/src/Geometry/Transform.h

@@ -35,7 +35,9 @@ template< typename Other,
           int OtherCols=Other::ColsAtCompileTime>
 struct ei_transform_product_impl;
 
-/** \class Transform
+/** \geometry_module \ingroup Geometry
+  *
+  * \class Transform
   *
   * \brief Represents an homogeneous transformation in a N dimensional space
   *