From cc75efdbb5d0fccbb2ca1853f5f4d4d454e4a468 Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Thu, 7 Nov 2019 15:57:23 +0100
Subject: [PATCH] Add static filter for Coplanar_3

---
 .../CGAL/internal/Static_filters/Coplanar_3.h | 54 +++++++++++++++++++
 .../internal/Static_filters/Static_filters.h  |  9 ++++
 .../include/CGAL/Kernel/interface_macros.h    |  2 +-
 3 files changed, 64 insertions(+), 1 deletion(-)
 create mode 100644 Filtered_kernel/include/CGAL/internal/Static_filters/Coplanar_3.h

diff --git a/Filtered_kernel/include/CGAL/internal/Static_filters/Coplanar_3.h b/Filtered_kernel/include/CGAL/internal/Static_filters/Coplanar_3.h
new file mode 100644
index 00000000000..20fbade4402
--- /dev/null
+++ b/Filtered_kernel/include/CGAL/internal/Static_filters/Coplanar_3.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 GeometryFactory (France)
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org)
+//
+// $URL$
+// $Id$
+// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
+//
+//
+// Author(s)     : Andreas Fabri, Laurent Rineau
+
+
+#ifndef CGAL_INTERNAL_STATIC_FILTERS_COPLANAR_3_H
+#define CGAL_INTERNAL_STATIC_FILTERS_COPLANAR_3_H
+
+namespace CGAL {
+
+namespace internal {
+
+namespace Static_filters_predicates {
+
+
+template < typename K_base, typename SFK >
+class Coplanar_3
+  : public K_base::Coplanar_3
+{
+  typedef typename K_base::Point_3 Point_3;
+  typedef typename K_base::Coplanar_3 Base;
+  typedef typename SFK::Orientation_3 Orientation_3;
+
+public:
+
+  typedef typename Base::result_type  result_type;
+
+
+
+  result_type 
+  operator()(const Point_3& p,const Point_3& q, const Point_3& r, const Point_3& s) const
+  {
+    return Orientation_3()(p,q,r,s) == COPLANAR;
+  }
+
+
+
+}; // end class Coplanar_3
+
+} // end namespace Static_filters_predicates
+
+} // end namespace internal
+
+} // end namespace CGAL
+
+#endif  // CGAL_INTERNAL_STATIC_FILTERS_COPLANAR_3_H
diff --git a/Filtered_kernel/include/CGAL/internal/Static_filters/Static_filters.h b/Filtered_kernel/include/CGAL/internal/Static_filters/Static_filters.h
index 9dbf6c02f5b..95216db79f9 100644
--- a/Filtered_kernel/include/CGAL/internal/Static_filters/Static_filters.h
+++ b/Filtered_kernel/include/CGAL/internal/Static_filters/Static_filters.h
@@ -42,6 +42,8 @@
 #endif // CGAL_DISABLE_STATIC_FILTERS_ADDED_2011
 
 
+#  include <CGAL/internal/Static_filters/Coplanar_3.h>
+
 #ifndef CGAL_NO_EQUAL_3_STATIC_FILTERS
 #  include <CGAL/internal/Static_filters/Equal_3.h>
 #  include <CGAL/internal/Static_filters/Equal_2.h>
@@ -96,6 +98,7 @@ class Static_filters : public K_base
 {
   typedef Static_filters<K_base>                    Self;
 
+  typedef Static_filters_predicates::Coplanar_3<K_base,Self>                     Coplanar_3;
 public:
 #ifndef CGAL_NO_EQUAL_3_STATIC_FILTERS
   typedef Static_filters_predicates::Equal_2<K_base>                        Equal_2;
@@ -137,6 +140,12 @@ public:
   collinear_3_object() const
   { return Collinear_3(); }
 
+  Coplanar_3
+  coplanar_3_object() const
+  {
+    return Coplanar_3();
+  }
+  
 #ifndef CGAL_NO_EQUAL_3_STATIC_FILTERS
  Equal_2
   equal_2_object() const
diff --git a/Kernel_23/include/CGAL/Kernel/interface_macros.h b/Kernel_23/include/CGAL/Kernel/interface_macros.h
index efe62876159..18d35b53366 100644
--- a/Kernel_23/include/CGAL/Kernel/interface_macros.h
+++ b/Kernel_23/include/CGAL/Kernel/interface_macros.h
@@ -488,7 +488,7 @@ CGAL_Kernel_pred_RT(Coplanar_orientation_3,
                     coplanar_orientation_3_object)
 CGAL_Kernel_pred_RT(Coplanar_side_of_bounded_circle_3,
                     coplanar_side_of_bounded_circle_3_object)
-CGAL_Kernel_pred(Coplanar_3,
+CGAL_Kernel_pred_RT(Coplanar_3,
 		 coplanar_3_object)
 CGAL_Kernel_pred(Counterclockwise_in_between_2,
 		 counterclockwise_in_between_2_object)