GRIDEDIT-2223 Added getting of netlink contour polygons

meshkernel/meshkernel.py

@@ -1757,6 +1757,39 @@ def mesh2d_casulli_refinement_on_polygon(
             byref(c_polygon),
         )
 
+    def mesh2d_compute_netlink_contour_polygons(self) -> GeometryList:
+        """Gets the netlink contour polygons from the MeshKernel.
+
+        Returns:
+            Mesh2d: A copy of the netlink contour polygons.
+        """
+
+        c_geometry_list_dimension = c_int()
+
+        self._execute_function(
+            self.lib.mkernel_mesh2d_compute_netlink_contour_polygons_dimension,
+            self._meshkernelid,
+            byref(c_geometry_list_dimension),
+        )
+
+        n_coordinates = c_geometry_list_dimension.value
+        x_coordinates = np.empty(n_coordinates, dtype=np.double)
+        y_coordinates = np.empty(n_coordinates, dtype=np.double)
+
+        edge_polygons = GeometryList(
+            x_coordinates=x_coordinates, y_coordinates=y_coordinates
+        )
+
+        c_edge_polygons = CGeometryList.from_geometrylist(edge_polygons)
+
+        self._execute_function(
+            self.lib.mkernel_mesh2d_compute_netlink_contour_polygons,
+            self._meshkernelid,
+            byref(c_edge_polygons),
+        )
+
+        return edge_polygons
+
     def mesh2d_compute_orthogonalization(
         self,
         project_to_land_boundary_option: ProjectToLandBoundaryOption,

tests/test_mesh2d_basics.py

@@ -2568,3 +2568,14 @@ def test_mesh2d_casulli_refinement_based_on_depths():
     # new mesh has more nodes and edges than the starting mesh, it has been refined
     assert len(mesh2d_not_refined.node_x) == 121
     assert len(mesh2d_refined.node_x) == 253
+
+
+def test_mesh2d_netlink_contour_polygons(meshkernel_with_mesh2d: MeshKernel):
+    """Test test_mesh2d_netlink_contour_polygons"""
+
+    mk = meshkernel_with_mesh2d(2, 2)
+
+    netlink_polygons = mk.mesh2d_compute_netlink_contour_polygons()
+
+    assert len(netlink_polygons.x_coordinates) == 48
+    assert len(netlink_polygons.y_coordinates) == 48