diff options
author | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2015-06-12 10:47:38 +0000 |
---|---|---|
committer | vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb> | 2015-06-12 10:47:38 +0000 |
commit | 24ed9e6896b0aafcaeaf19e5d2970915282fa7b7 (patch) | |
tree | 2bc02bec0eac7e145d63a56fd7fd2ea0bf565db3 /src/Alpha_shapes | |
parent | 844d6205eb6705935417b0ab45b0c71230bd9ed6 (diff) |
delaunay off reader/writer fix.
alpha complex algo seems ok. tests are Nok.
git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@611 636b058d-ea47-450e-bf9e-a15bfbe3eedb
Former-commit-id: 37cea3b33d783a77a23fa3a54a1bee106508d981
Diffstat (limited to 'src/Alpha_shapes')
3 files changed, 115 insertions, 68 deletions
diff --git a/src/Alpha_shapes/example/Delaunay_triangulation_off_rw.cpp b/src/Alpha_shapes/example/Delaunay_triangulation_off_rw.cpp index 6c9fcdab..fe889ec0 100644 --- a/src/Alpha_shapes/example/Delaunay_triangulation_off_rw.cpp +++ b/src/Alpha_shapes/example/Delaunay_triangulation_off_rw.cpp @@ -44,12 +44,12 @@ typedef CGAL::Delaunay_triangulation<K> T; // TriangulationDataStructure template parameter void usage(char * const progName) { - std::cerr << "Usage: " << progName << " filename.off dimension" << std::endl; + std::cerr << "Usage: " << progName << " inputFile.off dimension outputFile.off" << std::endl; exit(-1); // ----- >> } int main(int argc, char **argv) { - if (argc != 3) { + if (argc != 4) { std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl; usage(argv[0]); } @@ -68,37 +68,11 @@ int main(int argc, char **argv) { std::cerr << "Unable to read file " << offFileName << std::endl; exit(-1); // ----- >> } + + std::cout << "number_of_finite_full_cells= " << dt.number_of_finite_full_cells() << std::endl; - std::cout << "number of vertices=" << dt.number_of_vertices() << std::endl; - std::cout << "number of full cells=" << dt.number_of_full_cells() << std::endl; - std::cout << "number of finite full cells=" << dt.number_of_finite_full_cells() << std::endl; - - // Points list - /*for (T::Vertex_iterator vit = dt.vertices_begin(); vit != dt.vertices_end(); ++vit) { - for (auto Coord = vit->point().cartesian_begin(); Coord != vit->point().cartesian_end(); ++Coord) { - std::cout << *Coord << " "; - } - std::cout << std::endl; - } - std::cout << std::endl;*/ - - /*int i = 0, j = 0; - typedef T::Full_cell_iterator Full_cell_iterator; - typedef T::Facet Facet; - - for (Full_cell_iterator cit = dt.full_cells_begin(); cit != dt.full_cells_end(); ++cit) { - if (!dt.is_infinite(cit)) { - j++; - continue; - } - Facet fct(cit, cit->index(dt.infinite_vertex())); - i++; - } - std::cout << "There are " << i << " facets on the convex hull." << std::endl; - std::cout << "There are " << j << " facets not on the convex hull." << std::endl; -*/ - - std::string offOutputFile("out.off"); + std::string outFileName(argv[3]); + std::string offOutputFile(outFileName); Gudhi::alphashapes::Delaunay_triangulation_off_writer<T> off_writer(offOutputFile, dt); return 0; diff --git a/src/Alpha_shapes/include/gudhi/Alpha_shapes.h b/src/Alpha_shapes/include/gudhi/Alpha_shapes.h index 841c883a..2bc8b221 100644 --- a/src/Alpha_shapes/include/gudhi/Alpha_shapes.h +++ b/src/Alpha_shapes/include/gudhi/Alpha_shapes.h @@ -32,6 +32,9 @@ #include <stdio.h> #include <stdlib.h> +#include <math.h> // isnan, fmax + +#include <boost/bimap.hpp> #include <CGAL/Delaunay_triangulation.h> #include <CGAL/Epick_d.h> @@ -208,12 +211,14 @@ class Alpha_shapes { Squared_Radius squared_radius Kinit(compute_squared_radius_d_object); Is_Gabriel is_gabriel Kinit(side_of_bounded_sphere_d_object); - std::map<Kernel::Point_d, Vertex_handle> points_to_vh; + // bimap to retrieve vertex handles from points and vice versa + typedef boost::bimap< Kernel::Point_d, Vertex_handle > bimap_points_vh; + bimap_points_vh points_to_vh; // Start to insert at handle = 0 - default integer value Vertex_handle vertex_handle = Vertex_handle(); // Loop on triangulation vertices list for (auto vit = triangulation.vertices_begin(); vit != triangulation.vertices_end(); ++vit) { - points_to_vh[vit->point()] = vertex_handle; + points_to_vh.insert(bimap_points_vh::value_type(vit->point(), vertex_handle)); vertex_handle++; } @@ -223,10 +228,10 @@ class Alpha_shapes { typeVectorPoint pointVector; for (auto vit = cit->vertices_begin(); vit != cit->vertices_end(); ++vit) { #ifdef DEBUG_TRACES - std::cout << "points_to_vh=" << points_to_vh[(*vit)->point()] << std::endl; + std::cout << "points_to_vh=" << points_to_vh.left.at((*vit)->point()) << std::endl; #endif // DEBUG_TRACES // Vector of vertex construction for simplex_tree structure - vertexVector.push_back(points_to_vh[(*vit)->point()]); + vertexVector.push_back(points_to_vh.left.at((*vit)->point())); // Vector of points for alpha_shapes filtration value computation pointVector.push_back((*vit)->point()); } @@ -244,17 +249,99 @@ class Alpha_shapes { filtration_max = fmax(filtration_max, alpha_shapes_filtration); } } - - // Loop on triangulation finite full cells list - for (auto f_simplex : st_.skeleton_simplex_range(st_.dimension() - 1)) { - std::cout << "vertex = [" << st_.filtration(f_simplex) << "] "; + + // ### For i : d -> 0 + for (int decr_dim = st_.dimension(); decr_dim >= 0; decr_dim--) { + // ### Foreach Sigma of dim i + for (auto f_simplex : st_.skeleton_simplex_range(decr_dim)) { + int f_simplex_dim = st_.dimension(f_simplex); +#ifdef DEBUG_TRACES + std::cout << "f_simplex_dim= " << f_simplex_dim << " - decr_dim= " << decr_dim << std::endl; +#endif // DEBUG_TRACES + if (decr_dim == f_simplex_dim) { + typeVectorPoint pointVector; +#ifdef DEBUG_TRACES + std::cout << "vertex "; +#endif // DEBUG_TRACES + for (auto vertex : st_.simplex_vertex_range(f_simplex)) { + pointVector.push_back(points_to_vh.right.at(vertex)); +#ifdef DEBUG_TRACES + std::cout << (int) vertex << " "; +#endif // DEBUG_TRACES + } +#ifdef DEBUG_TRACES + std::cout << std::endl; +#endif // DEBUG_TRACES + // ### If filt(Sigma) is NaN : filt(Sigma) = alpha(Sigma) + if (isnan(st_.filtration(f_simplex))) { + Filtration_value alpha_shapes_filtration = 0.0; + // No need to compute squared_radius on a single point - alpha is 0.0 + if (f_simplex_dim > 0) { + alpha_shapes_filtration = squared_radius(pointVector.begin(), pointVector.end()); + } + st_.assign_filtration(f_simplex, alpha_shapes_filtration); +#ifdef DEBUG_TRACES + std::cout << "From NaN to alpha_shapes_filtration=" << st_.filtration(f_simplex) << std::endl; +#endif // DEBUG_TRACES + } + + // ### Foreach Tau face of Sigma + for (auto f_boundary : st_.boundary_simplex_range(f_simplex)) { +#ifdef DEBUG_TRACES + std::cout << "Sigma "; + for (auto vertex : st_.simplex_vertex_range(f_simplex)) { + std::cout << (int) vertex << " "; + } + std::cout << " - Tau "; + for (auto vertex : st_.simplex_vertex_range(f_boundary)) { + std::cout << (int) vertex << " "; + } + std::cout << std::endl; +#endif // DEBUG_TRACES + // insert the Tau points in a vector for is_gabriel function + typeVectorPoint pointVector; + Vertex_handle vertexForGabriel = Vertex_handle(); + for (auto vertex : st_.simplex_vertex_range(f_boundary)) { + pointVector.push_back(points_to_vh.right.at(vertex)); + } + // Retrieve the Sigma point that is not part of Tau - parameter for is_gabriel function + for (auto vertex : st_.simplex_vertex_range(f_simplex)) { + if (std::find(pointVector.begin(), pointVector.end(), points_to_vh.right.at(vertex)) == pointVector.end()) { + // vertex is not found in Tau + vertexForGabriel = vertex; + // No need to continue loop + break; + } + } + // ### If filt(Tau) is not NaN + // ### or Tau is not Gabriel of Sigma + if (!isnan(st_.filtration(f_boundary)) || + !is_gabriel(pointVector.begin(), pointVector.end(), points_to_vh.right.at(vertexForGabriel)) + ) { + // ### filt(Tau) = fmin(filt(Tau), filt(Sigma)) + Filtration_value alpha_shapes_filtration = fmin(st_.filtration(f_boundary), st_.filtration(f_simplex)); + st_.assign_filtration(f_boundary, alpha_shapes_filtration); +#ifdef DEBUG_TRACES + std::cout << "From Boundary to alpha_shapes_filtration=" << st_.filtration(f_boundary) << std::endl; +#endif // DEBUG_TRACES + } + } + } + } + } + +#ifdef DEBUG_TRACES + std::cout << "The complex contains " << st_.num_simplices() << " simplices" << std::endl; + std::cout << " - dimension " << st_.dimension() << " - filtration " << st_.filtration() << std::endl; + std::cout << std::endl << std::endl << "Iterator on Simplices in the filtration, with [filtration value]:" << std::endl; + for (auto f_simplex : st_.filtration_simplex_range()) { + std::cout << " " << "[" << st_.filtration(f_simplex) << "] "; for (auto vertex : st_.simplex_vertex_range(f_simplex)) { std::cout << (int) vertex << " "; } std::cout << std::endl; - if (st_.filtration(f_simplex) == filtration_unknown) - st_.assign_filtration(f_simplex, filtration_max); // TODO(VR) Compute filtration value from simplex } +#endif // DEBUG_TRACES #ifdef DEBUG_TRACES std::cout << "filtration_max=" << filtration_max << std::endl; @@ -286,7 +373,7 @@ class Alpha_shapes { return st_.filtration(); } - friend std::ostream& operator<<(std::ostream& os, const Alpha_shapes& alpha_shape) { + friend std::ostream& operator<<(std::ostream& os, const Alpha_shapes & alpha_shape) { // TODO: Program terminated with signal SIGABRT, Aborted - Maybe because of copy constructor Gudhi::Simplex_tree<> st = alpha_shape.st_; os << st << std::endl; diff --git a/src/Alpha_shapes/include/gudhi/Alpha_shapes/Delaunay_triangulation_off_io.h b/src/Alpha_shapes/include/gudhi/Alpha_shapes/Delaunay_triangulation_off_io.h index 1413ad89..a4e5e2fe 100644 --- a/src/Alpha_shapes/include/gudhi/Alpha_shapes/Delaunay_triangulation_off_io.h +++ b/src/Alpha_shapes/include/gudhi/Alpha_shapes/Delaunay_triangulation_off_io.h @@ -25,7 +25,7 @@ #include <string> #include <vector> #include <fstream> -#include <iterator> // std::distance +#include <map> #include "gudhi/Off_reader.h" @@ -130,6 +130,7 @@ class Delaunay_triangulation_off_reader { template<typename Complex> class Delaunay_triangulation_off_writer { public: + typedef typename Complex::Point Point; /** * name_file : file where the off will be written @@ -153,44 +154,29 @@ class Delaunay_triangulation_off_writer { } + // bimap to retrieve vertex handles from points and vice versa + std::map< Point, int > points_to_vh; + // Start to insert at default handle value + int vertex_handle = int(); + // Points list for (auto vit = save_complex.vertices_begin(); vit != save_complex.vertices_end(); ++vit) { for (auto Coord = vit->point().cartesian_begin(); Coord != vit->point().cartesian_end(); ++Coord) { stream << *Coord << " "; } stream << std::endl; + points_to_vh[vit->point()] = vertex_handle; + vertex_handle++; } - - for (auto cit = save_complex.full_cells_begin(); cit != save_complex.full_cells_end(); ++cit) { + for (auto cit = save_complex.finite_full_cells_begin(); cit != save_complex.finite_full_cells_end(); ++cit) { std::vector<int> vertexVector; stream << std::distance(cit->vertices_begin(), cit->vertices_end()) << " "; for (auto vit = cit->vertices_begin(); vit != cit->vertices_end(); ++vit) { - // Vector of vertex construction for simplex_tree structure - // Vertex handle is distance - 1 - //int vertexHdl = std::distance(save_complex.vertices_begin(), *vit); - // infinite cell is -1 for infinite - //vertexVector.push_back(vertexHdl); - // Vector of points for alpha_shapes filtration value computation + stream << points_to_vh[(*vit)->point()] << " "; } stream << std::endl; } - - - - - - /* - // Finite cells list - for (auto cit = save_complex.full_cells_begin(); cit != save_complex.full_cells_end(); ++cit) { - stream << std::distance(cit->vertices_begin(), cit->vertices_end()) << " "; // Dimension - for (auto vit = cit->vertices_begin(); vit != cit->vertices_end(); ++vit) { - //auto vertexHdl = *vit; - auto vertexHdl = std::distance(save_complex.vertices_begin(), vit) - 1; - // stream << std::distance(save_complex.vertices_begin(), *(vit)) - 1 << " "; - } - stream << std::endl; - }*/ stream.close(); } else { std::cerr << "Delaunay_triangulation_off_writer::Delaunay_triangulation_off_writer could not open file " << |