After doc review

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/alphashapes@931 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 578da0e6fff453560e666e8f00147f9e10cb6de6

1 files changed, 26 insertions, 10 deletions

diff --git a/src/Alpha_complex/example/Alpha_complex_from_points.cpp b/src/Alpha_complex/example/Alpha_complex_from_points.cpp
index e460f177..62f594d1 100644
--- a/src/Alpha_complex/example/Alpha_complex_from_points.cpp
+++ b/src/Alpha_complex/example/Alpha_complex_from_points.cpp
@@ -6,34 +6,50 @@
 #include <string>
 #include <vector>
 
-// to construct a Delaunay_triangulation from a OFF file
-#include "gudhi/Delaunay_triangulation_off_io.h"
-#include "gudhi/Alpha_complex.h"
+#include <gudhi/Alpha_complex.h>
 
-typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > Kernel;
+typedef CGAL::Epick_d< CGAL::Dimension_tag<2> > Kernel;
 typedef Kernel::Point_d Point;
 typedef std::vector<Point> Vector_of_points;
 
+void usage(char * const progName) {
+  std::cerr << "Usage: " << progName << " alpha_square_max_value" << std::endl;
+  std::cerr << "       i.e.: " << progName << " 32.0" << 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]);
+  }
+
+  double alpha_square_max_value = atof(argv[1]);
+  
   // ----------------------------------------------------------------------------
   // Init of a list of points
   // ----------------------------------------------------------------------------
   Vector_of_points points;
 
-  std::vector<double> coords = { 0.0, 0.0, 0.0, 1.0 };
+  std::vector<double> coords = { 1.0, 1.0 };
+  points.push_back(Point(coords.begin(), coords.end()));
+  coords = { 7.0, 0.0 };
+  points.push_back(Point(coords.begin(), coords.end()));
+  coords = { 4.0, 6.0 };
+  points.push_back(Point(coords.begin(), coords.end()));
+  coords = { 9.0, 6.0 };
   points.push_back(Point(coords.begin(), coords.end()));
-  coords = { 0.0, 0.0, 1.0, 0.0 };
+  coords = { 0.0, 14.0 };
   points.push_back(Point(coords.begin(), coords.end()));
-  coords = { 0.0, 1.0, 0.0, 0.0 };
+  coords = { 2.0, 19.0 };
   points.push_back(Point(coords.begin(), coords.end()));
-  coords = { 1.0, 0.0, 0.0, 0.0 };
+  coords = { 9.0, 17.0 };
   points.push_back(Point(coords.begin(), coords.end()));
 
   // ----------------------------------------------------------------------------
   // Init of an alpha complex from the list of points
   // ----------------------------------------------------------------------------
-  double max_alpha_square_value = 1e10;
-  Gudhi::alphacomplex::Alpha_complex<Kernel> alpha_complex_from_points(points, max_alpha_square_value);
+  Gudhi::alphacomplex::Alpha_complex<Kernel> alpha_complex_from_points(points, alpha_square_max_value);
 
   // ----------------------------------------------------------------------------
   // Display information about the alpha complex