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Diffstat (limited to 'example/Tangential_complex/example_with_perturb.cpp')
-rw-r--r-- | example/Tangential_complex/example_with_perturb.cpp | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/example/Tangential_complex/example_with_perturb.cpp b/example/Tangential_complex/example_with_perturb.cpp new file mode 100644 index 00000000..d0d877ea --- /dev/null +++ b/example/Tangential_complex/example_with_perturb.cpp @@ -0,0 +1,53 @@ +#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 subsampl = Gudhi::subsampling; +namespace tc = Gudhi::tangential_complex; + +typedef CGAL::Epick_d<CGAL::Dimension_tag < 3 >> Kernel; +typedef Kernel::FT FT; +typedef Kernel::Point_d Point; +typedef Kernel::Vector_d Vector; +typedef tc::Tangential_complex< +Kernel, CGAL::Dimension_tag<2>, +CGAL::Parallel_tag> TC; + +int main(void) { + const int INTRINSIC_DIM = 2; + const int AMBIENT_DIM = 3; + const int NUM_POINTS = 50; + + Kernel k; + + // Generate points on a 2-sphere + CGAL::Random_points_on_sphere_d<Point> generator(AMBIENT_DIM, 3.); + std::vector<Point> points; + points.reserve(NUM_POINTS); + for (int i = 0; i < NUM_POINTS; ++i) + points.push_back(*generator++); + + // Sparsify the point set + std::vector<Point> sparsified_points; + subsampl::sparsify_point_set(k, points, 0.1 * 0.1, + std::back_inserter(sparsified_points)); + sparsified_points.swap(points); + + // Compute the TC + TC tc(points, INTRINSIC_DIM, k); + tc.compute_tangential_complex(); + + // Try to fix inconsistencies. Give it 10 seconds to succeed + tc.fix_inconsistencies_using_perturbation(0.05, 10); + + // Export the TC into a Simplex_tree + Gudhi::Simplex_tree<> stree; + tc.create_complex(stree); + + return 0; +} |