From 25e597ac795e37dbc2326bac7ed1783766ef6c8b Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Thu, 23 Nov 2023 15:22:20 +0000
Subject: [PATCH 1/2] Poisson Surface Reconstruction: Enable Structural
 Filtering

---
 .../include/CGAL/Reconstruction_triangulation_3.h          | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Poisson_surface_reconstruction_3/include/CGAL/Reconstruction_triangulation_3.h b/Poisson_surface_reconstruction_3/include/CGAL/Reconstruction_triangulation_3.h
index 9f605978f7c..5b625f8042e 100644
--- a/Poisson_surface_reconstruction_3/include/CGAL/Reconstruction_triangulation_3.h
+++ b/Poisson_surface_reconstruction_3/include/CGAL/Reconstruction_triangulation_3.h
@@ -26,6 +26,7 @@
 #include <CGAL/Delaunay_triangulation_3.h>
 #include <CGAL/Delaunay_triangulation_cell_base_3.h>
 #include <CGAL/Triangulation_cell_base_with_info_3.h>
+#include <CGAL/Triangulation_structural_filtering_traits.h>
 
 #include <CGAL/algorithm.h>
 #include <CGAL/bounding_box.h>
@@ -148,6 +149,12 @@ struct Reconstruction_triangulation_default_geom_traits_3 : public BaseGt
 };
 
 
+template < class BaseGt >
+struct Triangulation_structural_filtering_traits<Reconstruction_triangulation_default_geom_traits_3<BaseGt> > {
+  typedef typename Triangulation_structural_filtering_traits<BaseGt>::Use_structural_filtering_tag  Use_structural_filtering_tag;
+};
+
+
 /// \internal
 /// The Reconstruction_triangulation_3 class
 /// provides the interface requested by the Poisson_reconstruction_function class:

From 8f8280ce34531e9ba720a76096e6d219c56d0cce Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Thu, 23 Nov 2023 19:37:23 +0000
Subject: [PATCH 2/2] Add structural filtering to Robust circumcenter traits

---
 .../CGAL/Robust_weighted_circumcenter_filtered_traits_3.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Triangulation_3/include/CGAL/Robust_weighted_circumcenter_filtered_traits_3.h b/Triangulation_3/include/CGAL/Robust_weighted_circumcenter_filtered_traits_3.h
index 0ab43248e21..beddf4c0b3d 100644
--- a/Triangulation_3/include/CGAL/Robust_weighted_circumcenter_filtered_traits_3.h
+++ b/Triangulation_3/include/CGAL/Robust_weighted_circumcenter_filtered_traits_3.h
@@ -18,6 +18,7 @@
 #include <CGAL/number_utils_classes.h>
 #include <CGAL/Cartesian_converter.h>
 #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
+#include <CGAL/Triangulation_structural_filtering_traits.h>
 #include <CGAL/constructions/kernel_ftC3.h>
 
 namespace CGAL {
@@ -531,6 +532,13 @@ public:
   Robust_circumcenter_filtered_traits_3(const Kernel& k = Kernel()) : Kernel(k) { }
 };
 
+
+template < class BaseGt >
+struct Triangulation_structural_filtering_traits<Robust_circumcenter_filtered_traits_3<BaseGt> > {
+    typedef typename Triangulation_structural_filtering_traits<BaseGt>::Use_structural_filtering_tag  Use_structural_filtering_tag;
+};
+
+
 template<class K_>
 class Robust_weighted_circumcenter_filtered_traits_3
   : public Robust_circumcenter_filtered_traits_3<K_>