test: add mesh_segmentation() test

Surface_mesh_approximation/test/Surface_mesh_approximation/CMakeLists.txt

@@ -48,10 +48,12 @@ create_single_source_cgal_program( "vsa_correctness_test.cpp" )
 
 create_single_source_cgal_program( "vsa_error_decrease_test.cpp" )
 
-create_single_source_cgal_program( "vsa_free_function_test.cpp" )
-
 create_single_source_cgal_program( "vsa_kernel_test.cpp" )
 
+create_single_source_cgal_program( "vsa_mesh_approximation_test.cpp" )
+
+create_single_source_cgal_program( "vsa_mesh_segmentation_test.cpp" )
+
 create_single_source_cgal_program( "vsa_meshing_manifold_test.cpp" )
 
 create_single_source_cgal_program( "vsa_metric_test.cpp" )

Surface_mesh_approximation/test/Surface_mesh_approximation/vsa_mesh_approximation_test.cpp

@@ -11,7 +11,7 @@ typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
 typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
 
 /**
- * This file tests the VSA free function API.
+ * This file tests the free function CGAL::VSA::mesh_approximation.
  */
 int main()
 {

Surface_mesh_approximation/test/Surface_mesh_approximation/vsa_mesh_segmentation_test.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <fstream>
+
+#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
+#include <CGAL/Polyhedron_3.h>
+#include <CGAL/vsa_mesh_segmentation.h>
+
+typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
+typedef CGAL::VSA::Plane_proxy<Kernel> Plane_proxy;
+typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
+typedef typename boost::graph_traits<Polyhedron>::face_descriptor face_descriptor;
+typedef boost::unordered_map<face_descriptor, std::size_t> Facet_index_map;
+typedef boost::associative_property_map<Facet_index_map> Facet_proxy_pmap;
+
+/**
+ * This file tests the free function CGAL::VSA::mesh_segmentation.
+ */
+int main()
+{
+  Polyhedron input;
+  std::ifstream file("data/sphere_iso.off");
+  if (!file || !(file >> input) || input.empty()) {
+    std::cerr << "Invalid off file." << std::endl;
+    return EXIT_FAILURE;
+  }
+
+  Facet_index_map fidx_map;
+  BOOST_FOREACH(face_descriptor f, faces(input))
+    fidx_map[f] = 0;
+  Facet_proxy_pmap fpxmap(fidx_map);
+
+  std::vector<Plane_proxy> proxies;
+
+  // free function interface with named parameters
+  CGAL::VSA::mesh_segmentation(input,
+    fpxmap, // output indexed face set
+    CGAL::VSA::parameters::seeding_method(CGAL::VSA::Hierarchical). // hierarchical seeding
+    max_nb_proxies(200). // both maximum number of proxies stop criterion,
+    min_error_drop(0.05). // and minimum error drop stop criterion are specified
+    nb_of_iterations(30). // number of clustering iterations after seeding
+    nb_of_relaxations(5). // number of relaxations in seeding
+    proxies(std::back_inserter(proxies))); // number of iterations after seeding
+
+  return EXIT_SUCCESS;
+}