6 files changed, 175 insertions, 0 deletions
diff --git a/src/common/example/CMakeLists.txt b/src/common/example/CMakeLists.txt
new file mode 100644
index 00000000..583a0027
--- /dev/null
+++ b/src/common/example/CMakeLists.txt
@@ -0,0 +1,30 @@
+project(Common_examples)
+
+add_executable ( vector_double_off_reader example_vector_double_points_off_reader.cpp )
+target_link_libraries(vector_double_off_reader ${CGAL_LIBRARY})
+file(COPY "${CMAKE_SOURCE_DIR}/data/points/alphacomplexdoc.off" DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/)
+add_test(NAME Common_example_vector_double_off_reader COMMAND $<TARGET_FILE:vector_double_off_reader>
+    "alphacomplexdoc.off")
+
+if (DIFF_PATH)
+  # Do not forget to copy test results files in current binary dir
+  file(COPY "vectordoubleoffreader_result.txt" DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/)
+
+  add_test(Common_example_vector_double_off_reader_diff_files ${DIFF_PATH}
+      ${CMAKE_CURRENT_BINARY_DIR}/vectordoubleoffreader_result.txt ${CMAKE_CURRENT_BINARY_DIR}/alphacomplexdoc.off.txt)
+endif()
+
+if(NOT CGAL_VERSION VERSION_LESS 4.11.0)
+  add_executable ( cgal_3D_off_reader example_CGAL_3D_points_off_reader.cpp )
+  target_link_libraries(cgal_3D_off_reader ${CGAL_LIBRARY})
+  add_test(NAME Common_example_vector_cgal_3D_off_reader COMMAND $<TARGET_FILE:cgal_3D_off_reader>
+      "${CMAKE_SOURCE_DIR}/data/points/tore3D_300.off")
+endif()
+
+# requires CGAL and Eigen3
+if(NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
+  add_executable ( cgal_off_reader example_CGAL_points_off_reader.cpp )
+  target_link_libraries(cgal_off_reader ${CGAL_LIBRARY})
+  add_test(NAME Common_example_vector_cgal_off_reader COMMAND $<TARGET_FILE:cgal_off_reader>
+      "${CMAKE_SOURCE_DIR}/data/points/alphacomplexdoc.off")
+endif(NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
diff --git a/src/common/example/cgal3Doffreader_result.txt b/src/common/example/cgal3Doffreader_result.txt
new file mode 100644
index 00000000..f992c8e3
--- /dev/null
+++ b/src/common/example/cgal3Doffreader_result.txt
@@ -0,0 +1,8 @@
+Point[1] = (0.959535, -0.418347, 0.302237)
+Point[2] = (2.16795, 1.85348, -0.52312)
+Point[3] = (-2.38753, -1.50911, -0.565889)
+Point[4] = (-2.70428, -1.25688, 0.188394)
+Point[5] = (-1.22932, -1.64337, -0.998632)
+...
+Point[300] = (-0.56244, 2.6018, -0.749591)
+
diff --git a/src/common/example/example_CGAL_3D_points_off_reader.cpp b/src/common/example/example_CGAL_3D_points_off_reader.cpp
new file mode 100644
index 00000000..4658d8d5
--- /dev/null
+++ b/src/common/example/example_CGAL_3D_points_off_reader.cpp
@@ -0,0 +1,41 @@
+#include <gudhi/Points_3D_off_io.h>
+
+#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using Kernel = CGAL::Exact_predicates_inexact_constructions_kernel;
+using Point_3 = Kernel::Point_3;
+
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " inputFile.off" << std::endl;
+  exit(-1);
+}
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
+    usage(argv[0]);
+  }
+
+  std::string off_input_file(argv[1]);
+  // Read the OFF file (input file name given as parameter) and triangulate points
+  Gudhi::Points_3D_off_reader<Point_3> off_reader(off_input_file);
+  // Check the read operation was correct
+  if (!off_reader.is_valid()) {
+    std::cerr << "Unable to read file " << off_input_file << std::endl;
+    usage(argv[0]);
+  }
+
+  // Retrieve the triangulation
+  std::vector<Point_3> point_cloud = off_reader.get_point_cloud();
+
+  int n {};
+  for (auto point : point_cloud) {
+    ++n;
+    std::cout << "Point[" << n << "] = (" << point[0] << ", " << point[1] << ", " << point[2] << ")\n";
+  }
+  return 0;
+}
diff --git a/src/common/example/example_CGAL_points_off_reader.cpp b/src/common/example/example_CGAL_points_off_reader.cpp
new file mode 100644
index 00000000..f45683a5
--- /dev/null
+++ b/src/common/example/example_CGAL_points_off_reader.cpp
@@ -0,0 +1,46 @@
+#include <gudhi/Points_off_io.h>
+
+// For CGAL points type in dimension d
+// cf. http://doc.cgal.org/latest/Kernel_d/classCGAL_1_1Point__d.html
+#include <CGAL/Epick_d.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using Kernel = CGAL::Epick_d< CGAL::Dynamic_dimension_tag >;
+using Point_d = Kernel::Point_d;
+
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " inputFile.off" << std::endl;
+  exit(-1);
+}
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
+    usage(argv[0]);
+  }
+
+  std::string off_input_file(argv[1]);
+  // Read the OFF file (input file name given as parameter) and triangulate points
+  Gudhi::Points_off_reader<Point_d> off_reader(off_input_file);
+  // Check the read operation was correct
+  if (!off_reader.is_valid()) {
+    std::cerr << "Unable to read file " << off_input_file << std::endl;
+    usage(argv[0]);
+  }
+
+  // Retrieve the triangulation
+  std::vector<Point_d> point_cloud = off_reader.get_point_cloud();
+
+  int n {};
+  for (auto point : point_cloud) {
+    std::cout << "Point[" << n << "] = ";
+    for (std::size_t i {0}; i < point.size(); i++)
+      std::cout << point[i] << " ";
+    std::cout << "\n";
+    ++n;
+  }
+  return 0;
+}
diff --git a/src/common/example/example_vector_double_points_off_reader.cpp b/src/common/example/example_vector_double_points_off_reader.cpp
new file mode 100644
index 00000000..5093da85
--- /dev/null
+++ b/src/common/example/example_vector_double_points_off_reader.cpp
@@ -0,0 +1,43 @@
+#include <gudhi/Points_off_io.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using Point_d = std::vector<double>;
+
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " inputFile.off" << std::endl;
+  exit(-1);
+}
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
+    usage(argv[0]);
+  }
+
+  std::string off_input_file(argv[1]);
+  // Read the OFF file (input file name given as parameter) and triangulate points
+  Gudhi::Points_off_reader<Point_d> off_reader(off_input_file);
+  // Check the read operation was correct
+  if (!off_reader.is_valid()) {
+    std::cerr << "Unable to read file " << off_input_file << std::endl;
+    usage(argv[0]);
+  }
+
+  // Retrieve the triangulation
+  std::vector<Point_d> point_cloud = off_reader.get_point_cloud();
+
+  std::ofstream output_file(off_input_file + ".txt");
+  int n {0};
+  for (auto point : point_cloud) {
+    output_file << "Point[" << n << "] = ";
+    for (std::size_t i {0}; i < point.size(); i++)
+      output_file << point[i] << " ";
+    output_file << "\n";
+    ++n;
+  }
+  output_file.close();
+  return 0;
+}
diff --git a/src/common/example/vectordoubleoffreader_result.txt b/src/common/example/vectordoubleoffreader_result.txt
new file mode 100644
index 00000000..b399425a
--- /dev/null
+++ b/src/common/example/vectordoubleoffreader_result.txt
@@ -0,0 +1,7 @@
+Point[0] = 1 1 0 
+Point[1] = 7 0 0 
+Point[2] = 4 6 0 
+Point[3] = 9 6 0 
+Point[4] = 0 14 0 
+Point[5] = 2 19 0 
+Point[6] = 9 17 0