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author | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2018-08-28 21:11:26 +0000 |
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committer | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2018-08-28 21:11:26 +0000 |
commit | ef84bab542eb07d83515293652841969dd462b1c (patch) | |
tree | b250a609623f919fd4f8730976b065bdacf1ef96 /src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp | |
parent | 1b65f580392d33ac3d8516acced98de6906e6ed6 (diff) |
Make fast/safe/exact, weighted/non-weighted, periodic/non-periodic more orthogonal choices
Only examples work for the moment. Periodic to be tested.
Add Alpha_complex_3d_from_points.cpp example. Maybe to be removed.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alpha_complex_3d_module_vincent@3840 636b058d-ea47-450e-bf9e-a15bfbe3eedb
Former-commit-id: f5621df603bdb149c52400a6095271ea0f54b84c
Diffstat (limited to 'src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp')
-rw-r--r-- | src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp b/src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp new file mode 100644 index 00000000..e96385c0 --- /dev/null +++ b/src/Alpha_complex/example/Alpha_complex_3d_from_points.cpp @@ -0,0 +1,56 @@ +#include <gudhi/Alpha_complex_3d.h> +// to construct a simplex_tree from alpha complex +#include <gudhi/Simplex_tree.h> + +#include <iostream> +#include <string> +#include <vector> +#include <limits> // for numeric limits + +using Alpha_complex_3d = Gudhi::alpha_complex::Alpha_complex_3d<Gudhi::alpha_complex::complexity::exact, false, false>; +using Point = Alpha_complex_3d::Point_3 ; +using Vector_of_points = std::vector<Point>; + +int main(int argc, char **argv) { + if (argc != 1) { + std::cerr << "Error: Number of arguments (" << argc << ") is not correct\n"; + std::cerr << "Usage: " << (argv[0] - 1) << " \n"; + exit(-1); // ----- >> + } + + // ---------------------------------------------------------------------------- + // Init of a list of points from a small molecule + // ---------------------------------------------------------------------------- + Vector_of_points points; + points.push_back(Point(1, -1, -1)); + points.push_back(Point(-1, 1, -1)); + points.push_back(Point(-1, -1, 1)); + points.push_back(Point(1, 1, 1)); + points.push_back(Point(2, 2, 2)); + + // ---------------------------------------------------------------------------- + // Init of an alpha complex from the list of points + // ---------------------------------------------------------------------------- + Alpha_complex_3d alpha_complex_from_points(points); + + Gudhi::Simplex_tree<> simplex; + if (alpha_complex_from_points.create_complex(simplex)) { + // ---------------------------------------------------------------------------- + // Display information about the alpha complex + // ---------------------------------------------------------------------------- + std::cout << "Alpha complex is of dimension " << simplex.dimension() << + " - " << simplex.num_simplices() << " simplices - " << + simplex.num_vertices() << " vertices." << std::endl; + + std::cout << "Iterator on alpha complex simplices in the filtration order, with [filtration value]:" << std::endl; + for (auto f_simplex : simplex.filtration_simplex_range()) { + std::cout << " ( "; + for (auto vertex : simplex.simplex_vertex_range(f_simplex)) { + std::cout << vertex << " "; + } + std::cout << ") -> " << "[" << simplex.filtration(f_simplex) << "] "; + std::cout << std::endl; + } + } + return 0; +} |