Merge remote-tracking branch 'cgal/6.0.x-branch' into master

Kernel_23/doc/Kernel_23/CGAL/Segment_3.h

@@ -99,7 +99,7 @@ returns the squared length of `s`.
 Kernel::FT squared_length() const;
 
 /*!
-returns the vector `s.target()` - `s`.`source()`.
+returns the vector `s.target()` - `s.source()`.
 */
 Vector_3<Kernel> to_vector() const;
 

Kinetic_space_partition/examples/Kinetic_space_partition/CMakeLists.txt

@@ -9,9 +9,10 @@ find_package(CGAL REQUIRED)
 include(CGAL_CreateSingleSourceCGALProgram)
 
 find_package(Eigen3 3.1.0 REQUIRED)
-if(Eigen3_FOUND)
+include(CGAL_Eigen3_support)
+
+if(TARGET CGAL::Eigen3_support)
   message(STATUS "Found Eigen")
-  include(CGAL_Eigen3_support)
 
   set(targets kinetic_partition)
 

Kinetic_space_partition/test/Kinetic_space_partition/CMakeLists.txt

@@ -5,18 +5,10 @@ cmake_minimum_required(VERSION 3.12...3.31)
 
 project(Kinetic_space_partition_Tests)
 
-set(CMAKE_CXX_STANDARD 17)
+find_package(CGAL REQUIRED)
-
-find_package(CGAL QUIET COMPONENTS Core)
 include(CGAL_CreateSingleSourceCGALProgram)
 
 find_package(Eigen3 3.1.0 REQUIRED)
-if(NOT Eigen3_FOUND)
-  message(ERROR "This project requires the Eigen library, and will not be compiled.")
-  return()
-endif()
-
-message(STATUS "Found Eigen")
 include(CGAL_Eigen3_support)
 
 set(targets kinetic_3d_test_all issue_8624)

Kinetic_surface_reconstruction/examples/Kinetic_surface_reconstruction/CMakeLists.txt

@@ -9,9 +9,10 @@ find_package(CGAL REQUIRED)
 include(CGAL_CreateSingleSourceCGALProgram)
 
 find_package(Eigen3 3.1.0 REQUIRED)
-if(Eigen3_FOUND)
+include(CGAL_Eigen3_support)
+
+if(TARGET CGAL::Eigen3_support)
   message(STATUS "Found Eigen")
-  include(CGAL_Eigen3_support)
 
   set(targets ksr_basic ksr_building ksr_parameters)
 

Kinetic_surface_reconstruction/test/Kinetic_surface_reconstruction/CMakeLists.txt

@@ -9,9 +9,10 @@ find_package(CGAL REQUIRED)
 include(CGAL_CreateSingleSourceCGALProgram)
 
 find_package(Eigen3 3.1.0 REQUIRED)
-if(Eigen3_FOUND)
+include(CGAL_Eigen3_support)
+
+if(TARGET CGAL::Eigen3_support)
   message(STATUS "Found Eigen")
-  include(CGAL_Eigen3_support)
 
   set(targets ksr_test ksr_reorientation ksr_regularization)
 

Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/Isotropic_remeshing/remesh_impl.h

@@ -1699,6 +1699,9 @@ private:
       {
         set_status(hf, MESH_BORDER); //only 1 or 2 of the listed halfedges
                                      //will survive face removal, but status will be correct
+        set_status(opposite(hf, mesh_), PATCH_BORDER); //idem
+                                     //some of them will not survive but setting status
+                                     //is cheaper then checking which should be set
       }
       CGAL::Euler::remove_face(h, mesh_);
     }

Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h

@@ -32,6 +32,10 @@
 #include <boost/iterator/function_output_iterator.hpp>
 #include <boost/container/small_vector.hpp>
 
+#ifdef CGAL_DEBUG_DECIMATION
+#include <CGAL/IO/polygon_soup_io.h>
+#endif
+
 #include <algorithm>
 #include <unordered_map>
 
@@ -243,7 +247,7 @@ bool is_edge_between_coplanar_faces(edge_descriptor e,
   Point_ref_3 s = get(vpm, target(next(opposite(h, tm), tm), tm) );
 
   if (coplanar_cos_threshold==-1)
-    return coplanar(p, q, r, s);
+    return coplanar(p, q, r, s) && coplanar_orientation(p, q, r, s)!=CGAL::POSITIVE;
   else
   {
     typename Kernel::Compare_dihedral_angle_3 pred;
@@ -848,6 +852,10 @@ bool decimate_impl(const TriangleMeshIn& tm_in,
 
   if (!is_polygon_soup_a_polygon_mesh(faces))
   {
+#ifdef CGAL_DEBUG_DECIMATION
+    CGAL::IO::write_polygon_soup("soup.off", corners, faces);
+    std::cout << "the output is not a valid polygon mesh!" << std::endl;
+#endif
     return false;
   }