diff options
author | cjamin <cjamin@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2016-06-24 12:23:40 +0000 |
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committer | cjamin <cjamin@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2016-06-24 12:23:40 +0000 |
commit | 8e78adfc0f09f128a541cb96dad7a547dd6a9d0c (patch) | |
tree | 74e844ba7217af91e0dc42a2263076a0173731df /src/Subsampling | |
parent | c90bcb4438cd23467ece39eb9815fe66cee04740 (diff) |
Add an example
git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/subsampling_and_spatialsearching@1334 636b058d-ea47-450e-bf9e-a15bfbe3eedb
Former-commit-id: df8ee96b7cbfcc4380e49956b2495ec8bf12895e
Diffstat (limited to 'src/Subsampling')
-rw-r--r-- | src/Subsampling/example/CMakeLists.txt | 29 | ||||
-rw-r--r-- | src/Subsampling/example/example_sparsify_point_set.cpp | 51 |
2 files changed, 80 insertions, 0 deletions
diff --git a/src/Subsampling/example/CMakeLists.txt b/src/Subsampling/example/CMakeLists.txt new file mode 100644 index 00000000..e7a8a9f7 --- /dev/null +++ b/src/Subsampling/example/CMakeLists.txt @@ -0,0 +1,29 @@ +cmake_minimum_required(VERSION 2.6) +project(Subsampling_examples) + +if(CGAL_FOUND) + if (NOT CGAL_VERSION VERSION_LESS 4.8.0) + message(STATUS "CGAL version: ${CGAL_VERSION}.") + + find_package(Eigen3 3.1.0) + if (EIGEN3_FOUND) + message(STATUS "Eigen3 version: ${EIGEN3_VERSION}.") + include( ${EIGEN3_USE_FILE} ) + include_directories (BEFORE "../../include") + + #add_executable( Subsampling_example_pick_random_points example_pick_random_points.cpp ) + + #add_executable( Subsampling_example_choose_farthest_point example_choose_farthest_point.cpp ) + #target_link_libraries(Subsampling_example_choose_farthest_point ${Boost_SYSTEM_LIBRARY} ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY}) + + add_executable(Subsampling_example_sparsify_point_set example_sparsify_point_set.cpp) + target_link_libraries(Subsampling_example_sparsify_point_set ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY}) + else() + message(WARNING "Eigen3 not found. Version 3.1.0 is required for Subsampling feature.") + endif() + else() + message(WARNING "CGAL version: ${CGAL_VERSION} is too old to compile Subsampling examples. Version 4.8.0 is required.") + endif () +else() + message(WARNING "CGAL not found. It is required for the Subsampling examples.") +endif() diff --git a/src/Subsampling/example/example_sparsify_point_set.cpp b/src/Subsampling/example/example_sparsify_point_set.cpp new file mode 100644 index 00000000..57171082 --- /dev/null +++ b/src/Subsampling/example/example_sparsify_point_set.cpp @@ -0,0 +1,51 @@ +/* This file is part of the Gudhi Library. The Gudhi library + * (Geometric Understanding in Higher Dimensions) is a generic C++ + * library for computational topology. + * + * Author(s): Clement Jamin + * + * Copyright (C) 2016 INRIA + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <gudhi/sparsify_point_set.h> + +#include <CGAL/Epick_d.h> +#include <CGAL/Random.h> + +#include <array> +#include <vector> +#include <iterator> + +int main (void) +{ + typedef CGAL::Epick_d<CGAL::Dimension_tag<4> > K; + typedef typename K::FT FT; + typedef typename K::Point_d Point_d; + + CGAL::Random rd; + + std::vector<Point_d> points; + for (int i = 0 ; i < 500 ; ++i) + points.push_back(Point_d(std::array<FT,4>({rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1),rd.get_double(-1.,1)}))); + + K k; + std::vector<Point_d> results; + Gudhi::subsampling::sparsify_point_set(k, points, 0.4, std::back_inserter(results)); + std::cout << "Before sparsification: " << points.size() << " points.\n"; + std::cout << "After sparsification: " << results.size() << " points.\n"; + + return 0; +} |