From 01b7bec722e18851acfc826ca572d01a127339c1 Mon Sep 17 00:00:00 2001
From: mcarrier <mcarrier@636b058d-ea47-450e-bf9e-a15bfbe3eedb>
Date: Tue, 9 May 2017 14:04:29 +0000
Subject: git-svn-id:
 svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/Nerve_GIC@2408
 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 324d557360a52e7181d9cf3c7d77c8445a367808
---
 src/Nerve_GIC/example/MapperDeltaFunc.cpp | 61 +++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/Nerve_GIC/example/MapperDeltaFunc.cpp

(limited to 'src/Nerve_GIC/example/MapperDeltaFunc.cpp')

diff --git a/src/Nerve_GIC/example/MapperDeltaFunc.cpp b/src/Nerve_GIC/example/MapperDeltaFunc.cpp
new file mode 100644
index 00000000..20924b9c
--- /dev/null
+++ b/src/Nerve_GIC/example/MapperDeltaFunc.cpp
@@ -0,0 +1,61 @@
+#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 coordinate \n";
+  std::cerr << "       i.e.: " << progName << " ../../../data/points/human.off 2 --v \n";
+  exit(-1);  // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if ((argc != 3) && (argc != 4)) usage(argc, (argv[0] - 1));
+
+  std::string off_file_name(argv[1]);
+  std::string func_file_name = argv[2];
+  bool verb = 0; if(argc == 4)  verb = 1;
+
+  // 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 Mapper Delta from an OFF file
+  // ---------------------------------------
+
+  Gudhi::graph_induced_complex::Graph_induced_complex GIC;
+  GIC.set_verbose(verb);
+
+  GIC.set_graph_from_automatic_rips(off_file_name);
+  GIC.set_function_from_file(func_file_name);
+  GIC.set_color_from_file(func_file_name);
+  GIC.set_automatic_resolution_for_GICMAP(); GIC.set_gain();
+  GIC.set_cover_from_function(1);
+  GIC.find_GICMAP_simplices_with_functional_minimal_cover();
+  GIC.plot_with_KeplerMapper();
+
+  Simplex_tree stree; GIC.create_complex(stree);
+
+  std::streambuf* streambufffer = std::cout.rdbuf();
+  std::ostream output_stream(streambufffer);
+
+  // ------------------------------------------
+  // Display information about the Mapper Delta
+  // ------------------------------------------
+
+  if(verb){
+    output_stream << "Mapper Delta is of dimension " << stree.dimension() <<
+                   " - " << stree.num_simplices() << " simplices - " <<
+                   stree.num_vertices() << " vertices." << std::endl;
+
+    output_stream << "Iterator on Mapper Delta 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;
+    }
+  }
+
+  return 0;
+}
-- 
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