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// Copyright (C) 2024 Paul T. Kühner
//
// This file is part of DOLFINX (https://www.fenicsproject.org)
//
// SPDX-License-Identifier: LGPL-3.0-or-later
#include <cstddef>
#include <limits>
#include <optional>
#include <mpi.h>
#include <catch2/catch_template_test_macros.hpp>
#include <catch2/catch_test_macros.hpp>
#include <catch2/matchers/catch_matchers.hpp>
#include <catch2/matchers/catch_matchers_floating_point.hpp>
#include <catch2/matchers/catch_matchers_range_equals.hpp>
#include <dolfinx/common/MPI.h>
#include <dolfinx/graph/AdjacencyList.h>
#include <dolfinx/mesh/Mesh.h>
#include <dolfinx/mesh/generation.h>
#include <dolfinx/mesh/utils.h>
#include <dolfinx/refinement/interval.h>
#include <dolfinx/refinement/refine.h>
using namespace dolfinx;
using namespace Catch::Matchers;
namespace
{
template <typename T>
void CHECK_adjacency_list_equal(
const dolfinx::graph::AdjacencyList<T>& adj_list,
const std::vector<std::vector<T>>& expected_list)
{
REQUIRE(static_cast<std::size_t>(adj_list.num_nodes())
== expected_list.size());
for (T i = 0; i < adj_list.num_nodes(); i++)
{
CHECK_THAT(adj_list.links(i),
Catch::Matchers::RangeEquals(expected_list[i]));
}
}
// template <typename T>
// constexpr auto EPS = std::numeric_limits<T>::epsilon();
} // namespace
TEMPLATE_TEST_CASE("Rectangle uniform refinement",
"refinement,rectangle,uniform", double) // TODO: fix float
{
/**
To Debug this test or visualize use:
from mpi4py import MPI
import febug
import pyvista
import dolfinx
mesh = dolfinx.mesh.create_rectangle(
MPI.COMM_WORLD,
((0.0, 0.0), (1.0, 1.0)),
(1, 1),
dolfinx.mesh.CellType.triangle,
ghost_mode=dolfinx.mesh.GhostMode.shared_facet,
)
mesh.topology.create_entities(1)
(
refined,
_,
_,
) = dolfinx.mesh.refine(mesh, redistribute=False)
plotter = pyvista.Plotter()
refined.topology.create_connectivity(0, 2)
for tdim in range(refined.topology.dim):
refined.topology.create_entities(tdim)
febug.plot_entity_indices(refined, tdim, plotter=plotter)
plotter.show()
*/
using T = TestType;
if (dolfinx::MPI::size(MPI_COMM_WORLD) > 1)
return;
// Mesh connectivity tested/available in mesh/rectangle.cpp
mesh::Mesh<T> mesh = dolfinx::mesh::create_rectangle<T>(
MPI_COMM_SELF, {{{0, 0}, {1, 1}}}, {1, 1}, mesh::CellType::triangle);
// plaza requires the edges to be pre initialized!
mesh.topology()->create_entities(1);
auto [mesh_fine, parent_cell, parent_facet] = refinement::refine(
mesh, std::nullopt, mesh::create_cell_partitioner(mesh::GhostMode::none),
refinement::Option::parent_cell_and_facet);
// vertex layout:
// 8---7---5
// |\ | /|
// | \ | / |
// | \|/ |
// 6---0---3
// | /|\ |
// | / | \ |
// |/ | \|
// 4---2---1
std::vector<T> expected_x = {/* v_0 */ 0.5, 0.5, 0.0,
/* v_1 */ 1.0, 0.0, 0.0,
/* v_2 */ 0.5, 0.0, 0.0,
/* v_3 */ 1.0, 0.5, 0.0,
/* v_4 */ 0.0, 0.0, 0.0,
/* v_5 */ 1.0, 1.0, 0.0,
/* v_6 */ 0.0, 0.5, 0.0,
/* v_7 */ 0.5, 1.0, 0.0,
/* v_8 */ 0.0, 1.0, 0.0};
// CHECK_THAT(mesh_fine.geometry().x(),
// RangeEquals(expected_x, [](auto a, auto b)
// { return std::abs(a - b) <= EPS<T>; }));
// edge layout:
// x---x---x
// |\ | /|
// | \ | / |
// | \|/ |
// x---x---x
// | /|\ |
// | / | \ |
// |/ | \|
// x---x---x
mesh_fine.topology()->create_connectivity(1, 0);
auto e_to_v = mesh_fine.topology()->connectivity(1, 0);
REQUIRE(e_to_v);
// CHECK_adjacency_list_equal(*e_to_v, {/* e_0 */ {0, 1},
// /* e_1 */ {0, 2},
// /* e_2 */ {0, 3},
// /* e_3 */ {0, 4},
// /* e_4 */ {0, 5},
// /* e_5 */ {0, 6},
// /* e_6 */ {0, 7},
// /* e_7 */ {0, 8},
// /* e_8 */ {1, 2},
// /* e_9 */ {1, 3},
// /* e_10 */ {2, 4},
// /* e_11 */ {3, 5},
// /* e_12 */ {4, 6},
// /* e_13 */ {5, 7},
// /* e_14 */ {6, 8},
// /* e_15 */ {7, 8}});
}
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