1 files changed, 65 insertions, 0 deletions
diff --git a/src/Nerve_GIC/example/simple_GIC.cpp b/src/Nerve_GIC/example/simple_GIC.cpp
new file mode 100644
index 00000000..e3d19cc8
--- /dev/null
+++ b/src/Nerve_GIC/example/simple_GIC.cpp
@@ -0,0 +1,65 @@
+#include <gudhi/GIC.h>
+
+void usage(int nbArgs, char * const progName) {
+  std::cerr << "Error: Number of arguments (" << nbArgs << ") is not correct\n";
+  std::cerr << "Usage: " << progName << " filename.off threshold function resolution gain [ouput_file.txt]\n";
+  std::cerr << "       i.e.: " << progName << " ../../data/points/test.off 1.5 test_cov \n";
+  exit(-1);  // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if ((argc != 6) && (argc != 7)) usage(argc, (argv[0] - 1));
+
+  std::string off_file_name(argv[1]);
+  double threshold = atof(argv[2]);
+  std::string function_file_name(argv[3]);
+  double resolution = atof(argv[4]);
+  double gain = atof(argv[5]);
+
+  // Type definitions
+  using Graph_t = boost::adjacency_list < boost::vecS, boost::vecS, boost::undirectedS,\
+                                          boost::property < vertex_filtration_t, Filtration_value >,\
+                                          boost::property < edge_filtration_t, Filtration_value > >;
+
+  // ----------------------------------------------------------------------------
+  // Init of a graph induced complex from an OFF file
+  // ----------------------------------------------------------------------------
+
+  Gudhi::graph_induced_complex::Graph_induced_complex GIC;
+  GIC.set_graph_from_rips(threshold, off_file_name);
+  GIC.set_cover_from_function(function_file_name,resolution,gain,0);
+  //GIC.find_GIC_simplices();
+  GIC.find_GIC_simplices_with_functional_minimal_cover(resolution,gain);
+  Simplex_tree stree; GIC.create_complex(stree);
+
+  std::streambuf* streambufffer;
+  std::ofstream ouput_file_stream;
+
+  if (argc == 7) {
+    ouput_file_stream.open(std::string(argv[4]));
+    streambufffer = ouput_file_stream.rdbuf();
+  } else {
+    streambufffer = std::cout.rdbuf();
+  }
+
+  std::ostream output_stream(streambufffer);
+
+  // ----------------------------------------------------------------------------
+  // Display information about the graph induced complex
+  // ----------------------------------------------------------------------------
+  output_stream << "Graph induced complex is of dimension " << stree.dimension() <<
+                   " - " << stree.num_simplices() << " simplices - " <<
+                   stree.num_vertices() << " vertices." << std::endl;
+
+  output_stream << "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)) {
+      output_stream << vertex << " ";
+    }
+    output_stream << std::endl;
+  }
+
+  ouput_file_stream.close();
+
+  return 0;
+}