Deprecating Diagonalize_traits: document dependency to Eigen

Bounding_volumes/doc/Bounding_volumes/CGAL/Approximate_min_ellipsoid_d.h

@@ -137,6 +137,8 @@ for display in Maplesoft's Maple.
 
 \cgalExample{Approximate_min_ellipsoid_d/ellipsoid_for_maple.cpp} 
 
+\note This class requires the \ref thirdpartyEigen library.
+
 */
 template< typename Traits >
 class Approximate_min_ellipsoid_d {

Classification/include/CGAL/Classification/Local_eigen_analysis.h

@@ -184,10 +184,9 @@ public:
     algorithm. Possible values are `Parallel_tag` (default value is %CGAL
     is linked with TBB) or `Sequential_tag` (default value otherwise).
     \tparam DiagonalizeTraits model of `DiagonalizeTraits` used for
-    matrix diagonalization. It can be omitted: if Eigen 3 (or greater)
-    is available and `CGAL_EIGEN3_ENABLED` is defined then an overload
-    using `Eigen_diagonalize_traits` is provided. Otherwise, the
-    internal implementation `Diagonalize_traits` is used.
+    matrix diagonalization. It can be omitted if Eigen 3 (or greater)
+    is available and `CGAL_EIGEN3_ENABLED` is defined. In that case,
+    an overload using `Eigen_diagonalize_traits` is provided.
 
     \param input point range.
     \param point_map property map to access the input points.

Classification/include/CGAL/Classification/Point_set_feature_generator.h

@@ -87,10 +87,8 @@ namespace Classification {
   is linked with TBB) or `Sequential_tag` (default value otherwise).
   \tparam DiagonalizeTraits model of `DiagonalizeTraits` used for
   matrix diagonalization. It can be omitted: if Eigen 3 (or greater)
-  is available and `CGAL_EIGEN3_ENABLED` is defined then an overload
-  using `Eigen_diagonalize_traits` is provided. Otherwise, the
-  internal implementation `Diagonalize_traits` is used.
-
+  is available and `CGAL_EIGEN3_ENABLED` is defined: in that case, an
+  overload using `Eigen_diagonalize_traits` is provided.
 */
 template <typename GeomTraits,
           typename PointRange,

Classification/include/CGAL/Classification/Point_set_neighborhood.h

@@ -30,7 +30,6 @@
 #include <CGAL/Search_traits_3.h>
 #include <CGAL/Fuzzy_sphere.h>
 #include <CGAL/Orthogonal_k_neighbor_search.h>
-#include <CGAL/Default_diagonalize_traits.h>
 #include <CGAL/centroid.h>
 #include <CGAL/grid_simplify_point_set.h>
 #include <CGAL/squared_distance_3.h>

Jet_fitting_3/doc/Jet_fitting_3/CGAL/Monge_via_jet_fitting.h

@@ -29,6 +29,7 @@ algebra algorithm required by the fitting method.  The scalar type, `SvdTraits::
 \sa `Eigen_svd`
 \sa `Monge_form`
 
+\note This class requires the \ref thirdpartyEigen library.
 */
 template< typename DataKernel, typename LocalKernel, typename SvdTraits >
 class Monge_via_jet_fitting {

Mesh_3/doc/Mesh_3/CGAL/lloyd_optimize_mesh_3.h

@@ -100,6 +100,7 @@ lloyd_optimize_mesh_3(c3t3,
 \sa `CGAL::perturb_mesh_3()` 
 \sa `CGAL::odt_optimize_mesh_3()` 
 
+\note This function requires the \ref thirdpartyEigen library.
 */
 
 template<typename C3T3, typename MeshDomain_3>

Point_set_processing_3/doc/Point_set_processing_3/NamedParameters.txt

@@ -49,7 +49,7 @@ No default value.
 \cgalNPBegin{diagonalize_traits} \anchor PSP_diagonalize_traits
  is the solver used for diagonalizing covariance matrices.\n
 \b Type: a class model of `DiagonalizeTraits`.\n
-\b Default: if \ref thirdpartyEigen "Eigen" 3.2 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined, then `CGAL::Eigen_diagonalize_traits` is used. Otherwise, the fallback `CGAL::Diagonalize_traits` is used (note that it is significantly slower, so using Eigen is strongly advised).\n
+\b Default: `CGAL::Eigen_diagonalize_traits` if \ref thirdpartyEigen "Eigen" 3.2 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined.\n
 \cgalNPEnd
 
 \cgalNPBegin{svd_traits} \anchor PSP_svd_traits

Principal_component_analysis/doc/Principal_component_analysis/CGAL/linear_least_squares_fitting_2.h

@@ -13,7 +13,7 @@ The tag `tag` identifies the dimension to be considered from the objects. For po
 
 The class `K` is the kernel in which the value type of the  `InputIterator` is defined. It can be omitted and deduced automatically from the value type. 
 
-The class `DiagonalizeTraits_` is a model of `DiagonalizeTraits`. It can be omitted: if Eigen 3 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined then an overload using `Eigen_diagonalize_traits` is provided. Otherwise, the internal implementation `Diagonalize_traits` is used.
+The class `DiagonalizeTraits_` is a model of `DiagonalizeTraits`. It can be omitted if Eigen 3 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined: in that case, an overload using `Eigen_diagonalize_traits` is provided.
 
 \cgalHeading{Requirements}
 

Principal_component_analysis/doc/Principal_component_analysis/CGAL/linear_least_squares_fitting_3.h

@@ -65,10 +65,9 @@ value type of `InputIterator` is defined. It can be omitted and deduced
 automatically from the value type.
 
 The class `DiagonalizeTraits_` is a model of `DiagonalizeTraits`. It
-can be omitted: if Eigen 3 (or greater) is available and
-`CGAL_EIGEN3_ENABLED` is defined then an overload using
-`Eigen_diagonalize_traits` is provided. Otherwise, the internal
-implementation `Diagonalize_traits` is used.
+can be omitted if Eigen 3 (or greater) is available and
+`CGAL_EIGEN3_ENABLED` is defined: in that case, an overload using
+`Eigen_diagonalize_traits` is provided.
 
 \note This function is significantly faster when using
 `Eigen_diagonalize_traits` and it is strongly advised to use this

Scale_space_reconstruction_3/include/CGAL/Scale_space_reconstruction_3/Weighted_PCA_smoother.h

@@ -61,11 +61,10 @@ namespace Scale_space_reconstruction_3
 
  *  \tparam DiagonalizeTraits model of `DiagonalizeTraits` that
  *  determines how to diagonalize a weighted covariance matrix to
- *  approximate a weighted point set. It can be omitted: if Eigen 3
- *  (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined
- *  then an overload using `Eigen_diagonalize_traits` is
- *  provided. Otherwise, the internal implementation
- *  `Diagonalize_traits` is used.
+ *  approximate a weighted point set. It can be omitted if Eigen 3 (or
+ *  greater) is available and `CGAL_EIGEN3_ENABLED` is defined: in
+ *  that case, an overload using `Eigen_diagonalize_traits` is
+ *  provided.
  *  \tparam ConcurrencyTag indicates whether to use concurrent
  *  processing. It can be omitted: if TBB (or greater) is available
  *  and `CGAL_LINKED_WITH_TBB` is defined then `Parallel_tag` is

Solver_interface/doc/Solver_interface/Concepts/DiagonalizeTraits.h

@@ -17,8 +17,6 @@ follows:
 \tparam FT Number type
 \tparam dim Dimension of the matrices and vectors
 
-\cgalHasModel `CGAL::Default_diagonalize_traits`
-\cgalHasModel `CGAL::Diagonalize_traits`
 \cgalHasModel `CGAL::Eigen_diagonalize_traits`
 */
 

Solver_interface/doc/Solver_interface/Solver_interface.txt

@@ -26,23 +26,12 @@ Library (MKL)</a>.
 The concept `DiagonalizeTraits<T,dim>` defines an interface for the
 diagonalization and computation of eigenvectors and eigenvalues of a
 symmetric matrix. `T` is the number type and `dim` is the dimension of
-the matrices and vector (set to 3 by default). We provide two models
-for this concept:
-
-- `Eigen_diagonalize_traits<T,dim>` uses the \ref thirdpartyEigen library.
-- `Diagonalize_traits<T,dim>` is an internal implementation that does not
-depend on another library.
-
-Although both models achieve the same computation,
-`Eigen_diagonalize_traits<T,dim>` is more precise and faster: it
-should thus be used if the \ref thirdpartyEigen library is
-available. The eigenvalues are stored in ascending order and
-eigenvectors are stored in accordance.
+the matrices and vector (set to 3 by default). We provide the model
+`Eigen_diagonalize_traits<T,dim>` that uses the \ref thirdpartyEigen library.
 
 This is an example of an eigen decomposition of a matrix using this
 class:
 
-
 \cgalExample{Solver_interface/diagonalize_matrix.cpp}
 
 

Solver_interface/include/CGAL/Default_diagonalize_traits.h

@@ -26,6 +26,8 @@
 #include <CGAL/Diagonalize_traits.h>
 #endif
 
+/// \cond SKIP_IN_MANUAL
+
 namespace CGAL {
 
 /// \ingroup PkgSolver
@@ -84,4 +86,6 @@ public:
 
 } // namespace CGAL
 
+/// \endcond
+
 #endif // CGAL_DEFAULT_DIAGONALIZE_TRAITS_H

Solver_interface/include/CGAL/Diagonalize_traits.h

@@ -30,6 +30,8 @@
   CGAL_DEPRECATED_MSG("CGAL::Diagonalize_traits is a deprecated class that can \
 lead to precision issues, please use CGAL::Eigen_diagonalize_traits")
 
+/// \cond SKIP_IN_MANUAL
+
 namespace CGAL {
 
 /// \ingroup PkgSolver
@@ -299,4 +301,6 @@ public:
 
 } // namespace CGAL
 
+/// \endcond
+
 #endif // CGAL_DIAGONALIZE_TRAITS_H