diff options
-rw-r--r-- | src/Tangential_complex/example/CMakeLists.txt | 3 | ||||
-rw-r--r-- | src/Tangential_complex/example/example.cpp | 78 |
2 files changed, 81 insertions, 0 deletions
diff --git a/src/Tangential_complex/example/CMakeLists.txt b/src/Tangential_complex/example/CMakeLists.txt index 32f6eebb..291432b0 100644 --- a/src/Tangential_complex/example/CMakeLists.txt +++ b/src/Tangential_complex/example/CMakeLists.txt @@ -8,9 +8,12 @@ if(CGAL_FOUND) target_link_libraries(Tangential_complex_example_basic ${CGAL_LIBRARY} ${Boost_DATE_TIME_LIBRARY}) add_executable( Tangential_complex_example_with_perturb example_with_perturb.cpp ) target_link_libraries(Tangential_complex_example_with_perturb ${CGAL_LIBRARY} ${Boost_DATE_TIME_LIBRARY}) + add_executable( example example.cpp ) + target_link_libraries(example ${CGAL_LIBRARY} ${Boost_DATE_TIME_LIBRARY}) if (TBB_FOUND) target_link_libraries(Tangential_complex_example_basic ${TBB_LIBRARIES}) target_link_libraries(Tangential_complex_example_with_perturb ${TBB_LIBRARIES}) + target_link_libraries(example ${TBB_LIBRARIES}) endif(TBB_FOUND) add_test(Tangential_complex_example_basic diff --git a/src/Tangential_complex/example/example.cpp b/src/Tangential_complex/example/example.cpp new file mode 100644 index 00000000..cd0f121f --- /dev/null +++ b/src/Tangential_complex/example/example.cpp @@ -0,0 +1,78 @@ +#include <gudhi/Tangential_complex.h> +#include <gudhi/sparsify_point_set.h> + +#include <CGAL/Epick_d.h> +#include <CGAL/Random.h> + +#include <array> +#include <vector> + +namespace tc = Gudhi::tangential_complex; + + +int main(void) { + typedef CGAL::Epick_d<CGAL::Dynamic_dimension_tag> Kernel; + typedef Kernel::FT FT; + typedef Kernel::Point_d Point; + typedef Kernel::Vector_d Vector; + typedef tc::Tangential_complex<Kernel, CGAL::Dynamic_dimension_tag, CGAL::Parallel_tag> TC; + + + const int INTRINSIC_DIM = 1; + + // Generate points on a 2-sphere + std::vector<Point> points; + // [[0, 0], [1, 0], [0, 1], [1, 1]] + std::vector<double> point = {0.0, 0.0}; + points.push_back(Point(point.size(), point.begin(), point.end())); + point = {1.0, 0.0}; + points.push_back(Point(point.size(), point.begin(), point.end())); + point = {0.0, 1.0}; + points.push_back(Point(point.size(), point.begin(), point.end())); + point = {1.0, 1.0}; + points.push_back(Point(point.size(), point.begin(), point.end())); + std::cout << "points = " << points.size() << std::endl; + Kernel k; + + // Compute the TC + TC tc(points, INTRINSIC_DIM, k); + tc.compute_tangential_complex(); + TC::Num_inconsistencies num_inc = tc.number_of_inconsistent_simplices(); + std::cout << "TC vertices = " << tc.number_of_vertices() << " - simplices = " << num_inc.num_simplices << + " - inconsistencies = " << num_inc.num_inconsistent_simplices << std::endl; + + // Export the TC into a Simplex_tree + Gudhi::Simplex_tree<> stree; + tc.create_complex(stree); + + std::cout << "********************************************************************\n"; + std::cout << "* The complex contains " << stree.num_simplices() << " simplices"; + std::cout << " - dimension " << stree.dimension() << " - filtration " << stree.filtration() << "\n"; + std::cout << "* Iterator on Simplices in the filtration, with [filtration value]:\n"; + for (auto f_simplex : stree.filtration_simplex_range()) { + std::cout << " " << "[" << stree.filtration(f_simplex) << "] "; + for (auto vertex : stree.simplex_vertex_range(f_simplex)) { + std::cout << static_cast<int>(vertex) << " "; + } + std::cout << std::endl; + } + + tc.fix_inconsistencies_using_perturbation(0.01, 30.0); + + // Export the TC into a Simplex_tree + tc.create_complex(stree); + + std::cout << "********************************************************************\n"; + std::cout << "* The complex contains " << stree.num_simplices() << " simplices\n"; + std::cout << " - dimension " << stree.dimension() << " - filtration " << stree.filtration() << "\n"; + std::cout << "* Iterator on Simplices in the filtration, with [filtration value]:\n"; + for (auto f_simplex : stree.filtration_simplex_range()) { + std::cout << " " << "[" << stree.filtration(f_simplex) << "] "; + for (auto vertex : stree.simplex_vertex_range(f_simplex)) { + std::cout << static_cast<int>(vertex) << " "; + } + std::cout << std::endl; + } + + return 0; +} |