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test_segment_intersection_tetrahedron_4.cc
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Fri, May 10, 09:13

test_segment_intersection_tetrahedron_4.cc
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/**
* @file test_segment_intersection_tetrahedron_4.cc
*
* @author Lucas Frerot <lucas.frerot@epfl.ch>
*
* @date creation: Fri Feb 27 2015
* @date last modification: Thu Jan 14 2016
*
* @brief Tests the intersection module with _tetrahedron_4 elements
*
* @section LICENSE
*
* Copyright (©) 2015 EPFL (Ecole Polytechnique Fédérale de Lausanne) Laboratory
* (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* 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;
test.type = _segment_2;
test.element = 0;
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.storage(), first_bary) &&
Math::are_vector_equal(3, bary2.storage(), second_bary) ) ||
(Math::are_vector_equal(3, bary1.storage(), second_bary) &&
Math::are_vector_equal(3, bary2.storage(), 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.storage(), 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);
UInt el1 = interface_mesh.getNbElement(_segment_2) - 2;
UInt 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.storage(), fourth_bary) &&
Math::are_vector_equal(3, bary2.storage(), fifth_bary) ) ||
(Math::are_vector_equal(3, bary1.storage(), fifth_bary) &&
Math::are_vector_equal(3, bary2.storage(), 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);
UInt 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.storage(), sixth_bary))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}

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