From 06ff6fac211d2823c7d14a6d2f4a4db03f48d2e3 Mon Sep 17 00:00:00 2001
From: vrouvrea <vrouvrea@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Fri, 26 Jan 2018 14:01:39 +0000
Subject: Seperate installation and examples from main page Move cover complex
 utilities from examples GIC.cpp example was not compiled, nor tested. It is
 removed. Persistence representation : no need to link with Boost_SYSTEM

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/trunk@3164 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: cf2bfa6c6de2ed359aaa165b9f80bca7e06defb1
---
 src/Nerve_GIC/utilities/Nerve.cpp | 96 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/Nerve_GIC/utilities/Nerve.cpp

(limited to 'src/Nerve_GIC/utilities/Nerve.cpp')

diff --git a/src/Nerve_GIC/utilities/Nerve.cpp b/src/Nerve_GIC/utilities/Nerve.cpp
new file mode 100644
index 00000000..6abdedc7
--- /dev/null
+++ b/src/Nerve_GIC/utilities/Nerve.cpp
@@ -0,0 +1,96 @@
+/*    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 coordinate resolution gain [--v] \n";
+  std::cerr << "       i.e.: " << progName << " ../../data/points/human.off 2 10 0.3 --v \n";
+  exit(-1);  // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if ((argc != 5) && (argc != 6)) usage(argc, argv[0]);
+
+  using Point = std::vector<float>;
+
+  std::string off_file_name(argv[1]);
+  int coord = atoi(argv[2]);
+  int resolution = atoi(argv[3]);
+  double gain = atof(argv[4]);
+  bool verb = 0;
+  if (argc == 6) verb = 1;
+
+  // --------------------------------
+  // Init of a Nerve from an OFF file
+  // --------------------------------
+
+  Gudhi::cover_complex::Cover_complex<Point> SC;
+  SC.set_verbose(verb);
+
+  bool check = SC.read_point_cloud(off_file_name);
+
+  if (!check) {
+    std::cout << "Incorrect OFF file." << std::endl;
+  } else {
+    SC.set_type("Nerve");
+
+    SC.set_color_from_coordinate(coord);
+    SC.set_function_from_coordinate(coord);
+
+    SC.set_graph_from_OFF();
+    SC.set_resolution_with_interval_number(resolution);
+    SC.set_gain(gain);
+    SC.set_cover_from_function();
+
+    SC.find_simplices();
+
+    SC.write_info();
+
+    Gudhi::Simplex_tree<> stree;
+    SC.create_complex(stree);
+    SC.compute_PD();
+
+    // ----------------------------------------------------------------------------
+    // Display information about the graph induced complex
+    // ----------------------------------------------------------------------------
+
+    if (verb) {
+      std::cout << "Nerve is of dimension " << stree.dimension() << " - " << stree.num_simplices() << " simplices - "
+                << stree.num_vertices() << " vertices." << std::endl;
+
+      std::cout << "Iterator on Nerve 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;
+}
-- 
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