CGAL 5.1.1 - 3D Surface Mesh Generation
#include <CGAL/Surface_mesh_default_triangulation_3.h>
#include <CGAL/Surface_mesh_default_criteria_3.h>
#include <CGAL/Complex_2_in_triangulation_3.h>
#include <CGAL/IO/Complex_2_in_triangulation_3_file_writer.h>
#include <fstream>
#include <CGAL/make_surface_mesh.h>
#include <CGAL/Gray_level_image_3.h>
#include <CGAL/Implicit_surface_3.h>
// default triangulation for Surface_mesher
// c2t3
typedef CGAL::Complex_2_in_triangulation_3<Tr> C2t3;
typedef Tr::Geom_traits GT;
int main() {
Tr tr; // 3D-Delaunay triangulation
C2t3 c2t3 (tr); // 2D-complex in 3D-Delaunay triangulation
// the 'function' is a 3D gray level image
Gray_level_image image("data/skull_2.9.inr", 2.9f);
// Carefully chosen bounding sphere: the center must be inside the
// surface defined by 'image' and the radius must be high enough so that
// the sphere actually bounds the whole image.
GT::Point_3 bounding_sphere_center(122., 102., 117.);
GT::FT bounding_sphere_squared_radius = 200.*200.*2.;
GT::Sphere_3 bounding_sphere(bounding_sphere_center,
// definition of the surface, with 10^-5 as relative precision
Surface_3 surface(image, bounding_sphere, 1e-5);
// defining meshing criteria
// meshing surface, with the "manifold without boundary" algorithm
CGAL::make_surface_mesh(c2t3, surface, criteria, CGAL::Manifold_tag());
std::ofstream out("");
std::cout << "Final number of points: " << tr.number_of_vertices() << "\n";