1 files changed, 55 insertions, 0 deletions
diff --git a/src/common/example/Delaunay_triangulation_off_rw.cpp b/src/common/example/Delaunay_triangulation_off_rw.cpp
new file mode 100644
index 00000000..d1aa7988
--- /dev/null
+++ b/src/common/example/Delaunay_triangulation_off_rw.cpp
@@ -0,0 +1,55 @@
+// to construct a Delaunay_triangulation from a OFF file
+#include "gudhi/Delaunay_triangulation_off_io.h"
+
+#include <CGAL/Delaunay_triangulation.h>
+#include <CGAL/Epick_d.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+
+// Use dynamic_dimension_tag for the user to be able to set dimension
+typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > K;
+typedef CGAL::Delaunay_triangulation<K> T;
+// The triangulation uses the default instantiation of the 
+// TriangulationDataStructure template parameter
+
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " inputFile.off outputFile.off" << std::endl;
+  exit(-1); // ----- >>
+}
+
+int main(int argc, char **argv) {
+  if (argc != 3) {
+    std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
+    usage(argv[0]);
+  }
+
+  std::string offInputFile(argv[1]);
+  // Read the OFF file (input file name given as parameter) and triangulates points
+  Gudhi::Delaunay_triangulation_off_reader<T> off_reader(offInputFile);
+  // Check the read operation was correct
+  if (!off_reader.is_valid()) {
+    std::cerr << "Unable to read file " << offInputFile << std::endl;
+    exit(-1); // ----- >>
+  }
+  
+  // Retrieve the triangulation
+  T* triangulation = off_reader.get_complex();
+  // Operations on triangulation
+  std::cout << "Number of vertices= " << triangulation->number_of_vertices() << std::endl;
+  std::cout << "Number of finite full cells= " << triangulation->number_of_finite_full_cells() << std::endl;
+
+  std::string outFileName(argv[2]);
+  std::string offOutputFile(outFileName);
+  // Write the OFF file (output file name given as parameter) with the points and triangulated cells as faces
+  Gudhi::Delaunay_triangulation_off_writer<T> off_writer(offOutputFile, triangulation);
+
+  // Check the write operation was correct
+  if (!off_writer.is_valid()) {
+    std::cerr << "Unable to write file " << offOutputFile << std::endl;
+    exit(-1); // ----- >>
+  }
+  
+  return 0;
+}
+\ No newline at end of file