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test_segment_intersection_tetrahedron_4.cc
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Wed, Dec 4, 01:43

test_segment_intersection_tetrahedron_4.cc
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/**
* Copyright (©) 2015-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh_segment_intersector.hh"
#include "mesh_geom_common.hh"
#include <iostream>
/* -------------------------------------------------------------------------- */
using namespace akantu;
typedef cgal::Cartesian K;
typedef K::Point_3 Point;
typedef K::Segment_3 Segment;
/* -------------------------------------------------------------------------- */
int main(int argc, char * argv[]) {
initialize("", argc, argv);
debug::setDebugLevel(dblError);
Mesh mesh(3), interface_mesh(3, "interface_mesh");
mesh.read("test_geometry_tetrahedron.msh");
MeshSegmentIntersector<3, _tetrahedron_4> intersector(mesh, interface_mesh);
intersector.constructData();
// Testing a segment going through the cube
Point point(1., 1., 1.);
Segment segment(CGAL::ORIGIN, point);
intersector.computeIntersectionQuery(segment);
std::cout << "number of seg_2 : " << interface_mesh.getNbElement(_segment_2)
<< std::endl;
if (interface_mesh.getNbElement(_segment_2) != 2)
return EXIT_FAILURE;
Vector<Real> bary(2), bary1(2), bary2(2);
Element test{_segment_2, 0, _not_ghost};
interface_mesh.getBarycenter(test, bary1);
test.element = 1;
interface_mesh.getBarycenter(test, bary2);
Real first_bary[] = {1. / 6., 1. / 6., 1. / 6.};
Real second_bary[] = {2. / 3., 2. / 3., 2. / 3.};
// We don't know the order of the elements, so here we test permutations
if (!((Math::are_vector_equal(3, bary1.data(), first_bary) &&
Math::are_vector_equal(3, bary2.data(), second_bary)) ||
(Math::are_vector_equal(3, bary1.data(), second_bary) &&
Math::are_vector_equal(3, bary2.data(), first_bary))))
return EXIT_FAILURE;
// Testing a segment completely inside one element
Point a(0.05, 0.05, 0.05), b(0.06, 0.06, 0.06);
Segment inside_segment(a, b);
intersector.computeIntersectionQuery(inside_segment);
test.element = interface_mesh.getNbElement(_segment_2) - 1;
interface_mesh.getBarycenter(test, bary);
Real third_bary[] = {0.055, 0.055, 0.055};
if (!Math::are_vector_equal(3, bary.data(), third_bary))
return EXIT_FAILURE;
// Testing a segment whose end points are inside elements
Point c(0.1, 0.1, 0.1), d(0.9, 0.9, 0.9);
Segment crossing_segment(c, d);
intersector.computeIntersectionQuery(crossing_segment);
auto el1 = interface_mesh.getNbElement(_segment_2) - 2;
auto el2 = el1 + 1;
test.element = el1;
interface_mesh.getBarycenter(test, bary1);
test.element = el2;
interface_mesh.getBarycenter(test, bary2);
Real fourth_bary[] = {13. / 60., 13. / 60., 13. / 60.};
Real fifth_bary[] = {37. / 60., 37. / 60., 37. / 60.};
// We don't know the order of the elements, so here we test permutations
if (!((Math::are_vector_equal(3, bary1.data(), fourth_bary) &&
Math::are_vector_equal(3, bary2.data(), fifth_bary)) ||
(Math::are_vector_equal(3, bary1.data(), fifth_bary) &&
Math::are_vector_equal(3, bary2.data(), fourth_bary))))
return EXIT_FAILURE;
// Testing a segment along the edge of elements
Point e(1, 0, 0), f(0, 1, 0);
Segment edge_segment(e, f);
auto current_nb_elements = interface_mesh.getNbElement(_segment_2);
intersector.computeIntersectionQuery(edge_segment);
if (interface_mesh.getNbElement(_segment_2) != current_nb_elements + 1)
return EXIT_FAILURE;
test.element = interface_mesh.getNbElement(_segment_2) - 1;
interface_mesh.getBarycenter(test, bary);
Real sixth_bary[] = {0.5, 0.5, 0};
if (!Math::are_vector_equal(3, bary.data(), sixth_bary))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}

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