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test_geometry_intersection.cc
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test_geometry_intersection.cc
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/**
* @file test_geometry_intersection.cc
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @date creation: Fri Feb 27 2015
* @date last modification: Fri Feb 27 2015
*
* @brief Tests the intersection module
*
* @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_geom_container.hh"
#include "mesh_geom_factory.hh"
#include "tree_type_helper.hh"
#include <CGAL/Cartesian.h>
#include <iostream>
/* -------------------------------------------------------------------------- */
using namespace akantu;
typedef CGAL::Cartesian<Real> K;
typedef boost::optional < TreeTypeHelper<2, _triangle_3>::tree::Intersection_and_primitive_id<K::Line_3>::Type > Line_intersection;
/* -------------------------------------------------------------------------- */
bool comparePoints(const K::Point_3 & a, const K::Point_3 & b);
bool compareSegments(const K::Segment_3 & a, const K::Segment_3 & b);
/* -------------------------------------------------------------------------- */
int main (int argc, char * argv[]) {
debug::setDebugLevel(dblWarning);
initialize("", argc, argv);
Math::setTolerance(1e-10);
Mesh mesh(2);
mesh.read("mesh.msh");
MeshGeomContainer container(mesh);
container.constructData();
const MeshGeomFactory<2, _triangle_3> * factory = dynamic_cast<const MeshGeomFactory<2, _triangle_3> *>(container.getFactoryForElementType(_triangle_3));
const TreeTypeHelper<2, _triangle_3>::tree & tree = factory->getTree();
K::Point_3 a(0., 0.25, 0.), b(1., 0.25, 0.);
K::Line_3 line(a, b);
if (tree.number_of_intersected_primitives(line) != 2)
return EXIT_FAILURE;
K::Point_3 begin(a), intermediate(0.25, 0.25, 0.), end(0.75, 0.25, 0.);
K::Segment_3 result_0(begin, intermediate), result_1(intermediate, end);
std::list<Line_intersection> list_of_intersections;
tree.all_intersections(line, std::back_inserter(list_of_intersections));
const Line_intersection & intersection_0 = list_of_intersections.front();
const Line_intersection & intersection_1 = list_of_intersections.back();
if (!intersection_0 || !intersection_1)
return EXIT_FAILURE;
if (const K::Segment_3 * segment = boost::get<K::Segment_3>(&(intersection_0->first))) {
if (!compareSegments(*segment, result_0)) {
return EXIT_FAILURE;
}
}
if (const K::Segment_3 * segment = boost::get<K::Segment_3>(&(intersection_1->first))) {
if (!compareSegments(*segment, result_1)) {
return EXIT_FAILURE;
}
}
finalize();
return EXIT_SUCCESS;
}
/* -------------------------------------------------------------------------- */
bool comparePoints(const K::Point_3 & a, const K::Point_3 & b) {
return Math::are_float_equal(a.x(), b.x()) && Math::are_float_equal(a.y(), b.y());
}
bool compareSegments(const K::Segment_3 & a, const K::Segment_3 & b) {
return (comparePoints(a.source(), b.source()) && comparePoints(a.target(), b.target())) ||
(comparePoints(a.source(), b.target()) && comparePoints(a.target(), b.source()));
}

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