1 files changed, 90 insertions, 0 deletions
diff --git a/utilities/Nerve_GIC/VoronoiGIC.cpp b/utilities/Nerve_GIC/VoronoiGIC.cpp
new file mode 100644
index 00000000..54bb871e
--- /dev/null
+++ b/utilities/Nerve_GIC/VoronoiGIC.cpp
@@ -0,0 +1,90 @@
+/*    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):       Mathieu Carrière
+ *
+ *    Copyright (C) 2017  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/GIC.h>
+
+#include <string>
+#include <vector>
+
+void usage(int nbArgs, char *const progName) {
+  std::cerr << "Error: Number of arguments (" << nbArgs << ") is not correct\n";
+  std::cerr << "Usage: " << progName << " filename.off N [-v] \n";
+  std::cerr << "       i.e.: " << progName << " ../../data/points/human.off 100 -v \n";
+  exit(-1);  // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if ((argc != 3) && (argc != 4)) usage(argc, argv[0]);
+
+  using Point = std::vector<float>;
+
+  std::string off_file_name(argv[1]);
+  int m = atoi(argv[2]);
+  bool verb = 0;
+  if (argc == 4) verb = 1;
+
+  // ----------------------------------------------------------------------------
+  // Init of a graph induced complex from an OFF file
+  // ----------------------------------------------------------------------------
+
+  Gudhi::cover_complex::Cover_complex<Point> GIC;
+  GIC.set_verbose(verb);
+
+  bool check = GIC.read_point_cloud(off_file_name);
+
+  if (!check) {
+    std::cout << "Incorrect OFF file." << std::endl;
+  } else {
+    GIC.set_type("GIC");
+
+    GIC.set_color_from_coordinate();
+
+    GIC.set_graph_from_OFF();
+    GIC.set_cover_from_Voronoi(Gudhi::Euclidean_distance(), m);
+
+    GIC.find_simplices();
+
+    GIC.plot_OFF();
+
+    Gudhi::Simplex_tree<> stree;
+    GIC.create_complex(stree);
+
+    // ----------------------------------------------------------------------------
+    // Display information about the graph induced complex
+    // ----------------------------------------------------------------------------
+
+    if (verb) {
+      std::cout << "Graph induced complex is of dimension " << stree.dimension() << " - " << stree.num_simplices()
+                << " simplices - " << stree.num_vertices() << " vertices." << std::endl;
+
+      std::cout << "Iterator on graph induced complex simplices" << std::endl;
+      for (auto f_simplex : stree.filtration_simplex_range()) {
+        for (auto vertex : stree.simplex_vertex_range(f_simplex)) {
+          std::cout << vertex << " ";
+        }
+        std::cout << std::endl;
+      }
+    }
+  }
+
+  return 0;
+}