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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file AUTHORS.md
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception OR LGPL-3.0-or-later
#include <config.h>
#include <iostream>
#include <dune/common/parallel/mpihelper.hh>
#include <dune/common/stringutility.hh>
#include <dune/common/test/testsuite.hh>
#include <dune/grid/yaspgrid.hh>
#include <dune/grid/uggrid.hh>
#include <dune/grid/utility/structuredgridfactory.hh>
#include <dune/geometry/quadraturerules.hh>
#include <dune/functions/gridfunctions/facenormalgridfunction.hh>
template<class GridView>
Dune::TestSuite checkFaceNormalGridFunction(const GridView& gridView, std::string name)
{
using Dune::Functions::Concept::isGridFunction;
using F = Dune::Functions::FaceNormalGridFunction<GridView>;
using EntitySet = typename F::EntitySet;
using Domain = typename EntitySet::GlobalCoordinate;
using Range = Domain;
auto testSuite = Dune::TestSuite(name);
// Check is GridFunction concept is satisfied
testSuite.check(isGridFunction<F, Range(Domain), EntitySet>())
<< "FaceNormalGridFunction does not model GridFunction concept";
// Check if normals coincide with intersection normals
// up to given tolerance at quadrature point.
double TOL = 1e-14;
std::size_t sampleQuadratureOrder = 10;
constexpr int dimension = GridView::dimension;
auto normals = Dune::Functions::FaceNormalGridFunction(gridView);
auto localNormals = localFunction(normals);
for(auto&& element : elements(gridView))
{
localNormals.bind(element);
for(const auto& intersection: intersections(gridView, element))
{
const auto& quad = Dune::QuadratureRules<double, dimension-1>::rule(intersection.type(), sampleQuadratureOrder);
double mismatch = 0.0;
for (const auto& quadPoint : quad)
{
auto normal = intersection.unitOuterNormal(quadPoint.position());
normal -= localNormals(intersection.geometryInInside().global(quadPoint.position()));
mismatch = std::max(mismatch, normal.infinity_norm());
}
testSuite.check(mismatch <= TOL)
<< "Normal mismatch of " << Dune::formatString("%12.5e", mismatch)
<< " for face " << intersection.indexInInside()
<< " of " << intersection.inside().type()
<< " with index " << gridView.indexSet().index(intersection.inside());
}
}
return testSuite;
}
int main (int argc, char* argv[]) try
{
Dune::MPIHelper::instance(argc, argv);
Dune::TestSuite testSuite;
{
using Grid = Dune::YaspGrid<2>;
auto grid = Dune::StructuredGridFactory<Grid>::createCubeGrid({{0,0}}, {{1,1}}, {{2,2}});
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "YaspGrid<2>"));
}
{
using Grid = Dune::YaspGrid<3>;
auto grid = Dune::StructuredGridFactory<Grid>::createCubeGrid({{0,0,0}}, {{1,1,1}}, {{2,2,2}});
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "YaspGrid<3>"));
}
{
using Grid = Dune::UGGrid<2>;
auto grid = Dune::StructuredGridFactory<Grid>::createSimplexGrid({{0,0}}, {{1,1}}, {{1,1}});
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "UGGrid<2> (triangles)"));
}
{
using Grid = Dune::UGGrid<2>;
auto factory = Dune::GridFactory<Grid>();
factory.insertVertex({0,0});
factory.insertVertex({0,1});
factory.insertVertex({1,0});
factory.insertVertex({2,2});
factory.insertElement(Dune::GeometryTypes::cube(2), {0,1,2,3});
auto grid = factory.createGrid();
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "UGGrid<2> (nonaffine rectangles)"));
}
{
using Grid = Dune::UGGrid<3>;
auto grid = Dune::StructuredGridFactory<Grid>::createSimplexGrid({{0,0,0}}, {{1,1,1}}, {{1,1,1}});
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "UGGrid<2> (triangles)"));
}
{
using Grid = Dune::UGGrid<3>;
auto factory = Dune::GridFactory<Grid>();
factory.insertVertex({0,0,0});
factory.insertVertex({1,0,0});
factory.insertVertex({0,1,0});
factory.insertVertex({1,1,0});
factory.insertVertex({0,0,1});
factory.insertVertex({1,0,1});
factory.insertVertex({0,1,1});
factory.insertVertex({2,2,2});
factory.insertElement(Dune::GeometryTypes::cube(3), {0,1,2,3,4,5,6,7});
auto grid = factory.createGrid();
grid->globalRefine(2);
testSuite.subTest(checkFaceNormalGridFunction(grid->leafGridView(), "UGGrid<3> (nonaffine cubes)"));
}
return testSuite.exit();
}
catch ( Dune::Exception &e )
{
std::cerr << "Dune reported error: " << e << std::endl;
return 1;
}
catch(...)
{
std::cerr << "Unknown exception thrown!" << std::endl;
return 1;
}
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